To investigate the factors that affect the amount energy produced Essay Example

To investigate the factors that affect the amount energy produced Essay To investigate the factors that affect the amount energy produced in neutralisation reactions. The Aim of this investigation is to see how the dependant variable, the heat realised as a result of neutralisation reaction changes as one independent variable is changed, and to find why these changes occur. Only one variable will be changed. This is because if more than one is changed as well, we will not know which factor is responsible for the change. The variables are specified below, along with the one that I have decided to vary.VariablesThe following variables can be controlled during the experiment and will be the ones we can change in the investigation. The one that I have chosen is listed below. These variables are called independent variables, and will allow us to assess and investigate the effect on the heat released by neutralisation reactions.1. The concentration of the acid or the alkali in the reaction could be decided to be varied (I have used the term alkali rather than base, because the substance will already be dissolved in water which is the definition of an alkali). To carry this out, one would have to obtain acids or bases or both of varied concentration, by obtaining a fairly strong concentration, and then diluting it down to get varied concentrations.This procedure would be time consuming, and there would certainly be room for much error, as the concentration may not be measured out correctly, leading to inaccuracy. A general trend that would probably be seen is that, as the concentration goes up, so does the heat released by neutralisation. This is because there are more ions in a solution of a higher concentration. I have listed this variable as one, but it is really two different variables: one can either vary the concentration of the acid or that of the base.2.The effect caused by the volume of the reactants could also be investigated. To do this, one would merely have to repeat the procedure, but using different volumes of the reactants each time. This procedure would be simple and safe, but if the experiment is wished to be very accurate, you would have to use a pipette, which proves to be time consuming. A pattern that would be visible when the different volumes of acid and alkali are mixed is that, as the volume rises, the heat of neutralisation too would go up, because there are again more ions in the volume to be neutralised. The conditions for this theory are as follows: the different volumes must be of the same concentration, if they are not of the same concentration the results would not show the correct pattern as two variables would be being altered.3. If desired, it is also possible to vary the strength of the acid and/or base. By this, it is meant that a weak acid could be used, like Ethanoic acid, with a weak, and then strong alkali; the results could be compared to that which occurs when a strong acid is used with either alkali. The limitations of varying this factor are as follows: there is only one link between a strong and a weak acid, which is merely a scale called the pH scale. If this factor were investigated, we would obviously find that the combination of a strong acid and alkali would reproduce the highest energy rise. This is because the strong acids and alkalis dissociate to a higher degree, they split up completely into their composite ions. In weak acids, the degree of ionisation is less, and as a result of this, the number of ions in the solution is less, which prevents complete neutralisation.4. The type of acid or alkali could also be used as a variable. This process would be investigated by using different acids and alkalis, whether they are strong or weak. The results of each acid and alkali (strong and weak) would be compared. This variable could be put under the same category of varying the strength of the acid. This is because as different types of acids and alkalis are being used, the strength of those acids and alkalis would also be being varied in the pr ocess. The other factors of whether the acid is Monoprotic, Diprotic or Triprotic all come under this heading. Acids, which form one H+ ion from each acid molecule, are called Monoprotic. Acids which form two are called Diprotic. Acids, which form three, are called Triprotic.5. The last variable that could be used in the investigation is altering pressure of the acid and alkali. To do this, you would have to have an expensive, impractical piece of apparatus that would allow the pressure to be varied. The practical would be very difficult to perform and would be impractical. If you decided to use this procedure, you must also take safety precautions, because there is potential for the pressure container to either implode or explode. I believe that if the pressure were raised, there would not be much of a difference to the heat of neutralisation, unless it was raised fairly high which again is a limitation to this procedure. Another problem is that the equipment needed for this variab le is not easy to obtain, and therefore couldnt be used.Introduction:Neutralisation reactionsAcids and alkalis are defined as:An Acid:A substance that dissolves in water, producing H+ ions as the onlypositive ions.An acid is a substance, which contains hydrogen, which may be replaced by a metal to form a salt.Properties:They change moist litmus paper from blue to red.They are soluble in water.They are electrolytes.They also have a sour or sharp taste.Cautions:Some acids are poisonousMany acids are corrosive and thus dangerous. They burn flesh.Acids as proton donors:Acids produce hydrogen ions as the only positive ion. For example when hydrogen chloride dissolves in water the following process occurs.HCL(aq) H+ (aq) + CL- (aq)The hydrogen ion is sometimes called a proton. In water, the proton is combined with water as a result of the following process:HCL(aq) + H2O(l) H3O+ (aq) + CL (aq)H30+ is known as a hydroxonium ion.Hydrochloric acid has donated its protons to the water:H+ (aq ) + H2O (l) H30+ (aq)All acids are proton donors.Strong acids are fully ionized in water and are strong electrolytes. A strong acid produces a high concentration of H+ ions in a water solution. E.g. Hydrochloric acid. (HCl). Examples: sulphuric acid, hydrochloric acid and nitric acid. For instance, nitric acid:HNO3 (aq) + H2O (l) H3O+ (aq) + NO3- (aq)Weak acids are partially ionized in water and are weak electrolytes. Examples: Ethanoic acid. A weak acid: Produces a low concentration of H+ ions in a water solution. E.g. Ethanoic acid. (CH3CO2H)Common strong acids include:Hydrochloric acid (HCl)Nitric acid (HNO3)Sulphuric acid (H2SO4)Common weak acids include:Citric acid (H3C6H5O7)Ethanoic acid (CH3COOH) (vinegar)Alkalis and BasesA soluble base is something which produces OH- ions in water.A Base is a substance, which will react with an acid to form a salt.A base is a proton acceptor.An alkali is a base, which is soluble in water.Properties:They change litmus paper from red to blue .They are electrolytes.In addition many alkalis have a soapy feel.All bases and alkalis, except ammonia, are metal oxides or metal hydroxides.CAUTION: Many alkalis may be corrosive and poisonous. Example: sodium hydroxide is often called caustic soda. Caustic means burning.A strong alkali:Produces a high concentration of OH- ions in a water solution. Eg. Sodium hydroxide. (NaOH)Strong alkalis are fully ionized in water and are strong electrolytes.Weak alkali:Weak alkalis are only partially ionized in water and are weak electrolytes. A weak alkali produces a low concentration of OH- ions in a water solution. E.g. Ammonia solution. (NH4OH)Bases as proton acceptors- when a base reacts with an acid to form a salt, it accepts. Example: magnesium oxide reacts with sulphuric acid to form magnesium sulphateMgO(s) + H2SO4 (aq) MgSO4 (aq) + H20 (l)During this reaction the oxide ion, O2-, of the base accepts 2 protons H+ (O2- (s) + 2H+ (aq) H2O (l))Common strong alkalis include:Sodium hydrox ide (NaOH)Potassium hydroxide (KOH)Common weak alkalis include:Ammonium hydroxide (NH4OH)Aluminium hydroxide (Al(OH)3)Magnesium hydroxide (Mg(OH)2)Hydroxide ions:When alkalis dissolve in water an alkaline solution is formed. Alkaline solutions contain hydroxide ions. Example solid sodium hydroxide produces hydroxide ions when added to water.NaOH(s) Na+(aq) + OH(aq)These hydroxide ions accept protons to form water in the reactions between acids and alkalis.H+ (aq) + OH- (aq) H2O (l)Neutralization reactionsAcids react with bases to form salts.Acid + Base salt + waterWhen aqueous solutions of an acid and a base are combined, a neutralisation reaction occurs. This reaction is characteristically very rapid and generally produces water and a salt. For a strong acid and a strong base in water, the neutralisation reaction is between the hydrogen and hydroxide ions dissolved in solution: H+ + OH- H2ONeutralization is the reaction between an acid and a base in such quantities that only th e salt + water are produced and no acid or base remain in the solution. When reacting both acid and alkali, both quantities must be as equal as possible, if a neutral solution is desired.Strong acids and strong bases completely break up, or dissociate, into their constituent ions when they dissolve in water. In the case of hydrochloric acid, hydrogen ions, H+, and chloride ions, Cl-, are formed. In the case of sodium hydroxide, sodium ions, Na+, and hydroxide ions, OH-, are formed. The hydrogen and hydroxide ions readily unite to form water. If the number of hydrogen ions in the hydrochloric acid solution is equal to the number of hydroxide ions in the sodium hydroxide solution, complete neutralisation occurs when the two solutions are mixed.Heat Involved in Chemical ReactionsThe reaction of neutralisation is of course an exothermic reaction. This means that heat is given out during the chemical change that occurs. Along with all neutralisation reactions, all combustion reactions ar e exothermic, as they of course give out heat. The reactions, which are accompanied by a drop in temperature, are known as endothermic reactions; these reactions take in heat. When using a value of measure to the amount of heat given out, the end result is given a negative value for the change in energy. This may seem a bit odd due to the fact that it is clear that an exothermic reaction emits heat. The reason for giving exothermic reactions a negative ?H value is because the energy held by the substance has decreased, conversely, in an endothermic reaction, the energy of the actual substance has risen because the energy is held in the bonds.The reason for heat being released from a reaction is because there are more bonds broken than are made, when bonds are broken, energy is taken in whereas the making of bonds leads to energy being produced. If the reaction is endothermic, there are obviously more bonds to be broken than have been made. It is also the case that stronger bonds tak e more energy to break than weaker bonds, and when stronger bonds are made, they release a greater amount of energy than when weaker bonds are created. Going by this, it is clear that every single reaction will have, to some degree, an energy change. Another factor discovered is that the amount of energy taken in by breaking bonds equals the amount of energy released through the creating of new bonds.The amount of energy taken in or released can be expressed in kilojoules or joules, the SI unit for energy. To make the investigation fair I will express my values per mole. The energy changes that occur in reactions can be shown using energy level diagrams. In these diagrams, energy goes on the y-axis, and the x-axis is labelled as the reaction process, which shows the progress of the reaction. These diagrams do not show any numerical values, they are only used to show trends of energy changes in exothermic and endothermic reaction. The enthalpy diagrams are shown below, for both endot hermic and exothermic reactionsThe equation used to work out the energy transferred is ENERGY (KJ)= S.H.C X MASS (in g) X temperature change (in Kelvin)Exothermic Reaction Endothermic ReactionProductsReactantsProducts ReactantsProgress Of reaction Progress Of reactionI have chosen to vary the type of the acid, for my investigation. I have decided that I am going to have a wide selection of different acids to investigate, but for the alkali, I am only going to have one weak and one strong one. I have chosen to vary the factor of type of acid, rather than volume or concentration (of either acid or alkali), because it would allow a simple and easy procedure. Another reason for choosing this variable is that it will allow a multitude of different combinations that will lead to clear-cut conclusions. The procedure for this variable is also somewhat less complex than most of the others. The acids that I will use for my experiments will be one molar values of sulphuric, hydrochloric, nitri c, Ethanoic, methanoic and citric acid. I will use one molar Sodium hydroxide for the course of the investigation.Preliminary experimentAim: to carry out the study on how the change in temperature of a neutralisation reaction is effect by the change in acid used in the reaction. I am going to use 6 different acids and 1 alkali for each experiment.Prediction: I predict that the stronger acids will produce a higher temperature rise because, first of all, they have no bonds to be broken; in solution they exist as their component ions, completely dissociated. It is known that the breaking of bonds causes energy to be taken in, and when bonds are made, energy is given out. Another reason for a stronger acid producing a higher value for the heat of neutralisation is because it has more free H+ ions. I have deduced this because it is known that in a strong acid, all of the molecules are dissociated into their component ions. When the strong acid is used to neutralise the alkali, a more vig orous reaction would occur as a result of there being more H+ ions in the solution to neutralise the OH- ions in the alkali to give out more heat.Apparatus:2* 100 ml beakers2* 500 ml beaker2 measuring cylindersThermometerStirring rodMethod:Collect the apparatus shown in the list above.Measure 25 ML of acid.Then place the acid in a measuring cylinder, to check if the volume is exactly 25 ml.Then collect 25ml of alkali, and do the same as the acid except in a different measuring cylinder.If the acid is Diprotic or Triprotic, and you are reacting it with a monoprotic alkali then you must use double or triple the volume of alkali in ratio to the amount of acid. This is to compensate for the extra H+ ions, which if not compensated for would result in an unfair experiment.Measure the temperature for both acid and alkali and note the value down.Then pour both into a beaker with the thermometer in the beaker as well.Record the temperature rise. Perform this experiment for the rest of the ac ids.Diagram for preliminary experimentResults of preliminary experimentSulphuricSodium Hydroxide20.020.032.012.0NitricSodium Hydroxide21.020.028.07.5HydrochloricSodium Hydroxide20.021.00.07.5EthanoicSodium Hydroxide20.021.027.06.5MethanoicSodium Hydroxide21.019.027.57.5CitricSodium Hydroxide20.021.027.06.5AcidAlkaliInitial Acid Temp. à ¯Ã‚ ¿Ã‚ ½CInitial Alkali Temp. à ¯Ã‚ ¿Ã‚ ½CFinal Temp. à ¯Ã‚ ¿Ã‚ ½CTemp. Rise à ¯Ã‚ ¿Ã‚ ½CConclusion of preliminary resultsThe preliminary experiment performed was fairly well done, but there are several minor adjustments that could be made for when doing the real thing. Firstly, instead of using a beaker to mix the acid and alkali, a polystyrene cup could be used instead. This would stop energy being lost in the form of heat, to the surroundings. Also a lid would be placed on the polystyrene cup when reacting the acid and alkali to prevent further heat loss. I believe these are the only adjustments that need to be made for the real experiment. Th e prediction made was justified in the results processed, as the stronger acids produced a higher temperature rise due to the fact that, first of all, they have no bonds to be broken; in solution they exist as their component ions, completely dissociated. It is known that the breaking of bonds causes energy to be taken in, and when bonds are made, energy is given out. Another reason for a stronger acid producing a higher value for the heat of neutralisation is because it has more free H+ ions. I have deduced this because it is known that in a strong acid, all of the molecules are dissociated into their component ions. When the strong acid is used to neutralise the alkali, a more vigorous reaction would occur as a result of there being more H+ ions in the solution to neutralise the OH- ions in the alkali to give out more heat. For sulphuric acid there was a temperature change of 12*C, which was expected as it is a strong acid. However, for hydrochloric and nitric acid the temperature change was not as significant as expected. This could be due to wrong amounts of volume being mixed and more care will be taken when doing the actual experiment, to make sure equal amounts of volume are used. To avoid anomalous results the experiment could be repeated and I will do this in the real thing.Actual ExperimentAim: to carry out the study on how the change in temperature of a neutralisation reaction is effect by the change in acid used in the reaction. I am going to use 6 different acids and 1 alkali for the whole investigation, all with a concentration of one molar.Prediction: I predict that the stronger acids will produce a higher temperature rise because, first of all, they have no bonds to be broken; in solution they exist as their component ions, completely dissociated. It is known that the breaking of bonds causes energy to be taken in, and when bonds are made, energy is given out. Another reason for a stronger acid producing a higher value for the heat of neutralis ation is because it has more free H+ ions. I have deduced this because it is known that in a strong acid, all of the molecules are dissociated into their component ions. When the strong acid is used to neutralise the alkali, a more vigorous reaction would occur as a result of there being more H+ ions in the solution to neutralise the OH- ions in the alkali to give out more heat.Apparatus:2* 100 ml beakers1* 500 ml beaker2 measuring cylinders2 ThermometersStirring rodPolystyrene cup and lidMethod:Collect the apparatus shown in the list above.Measure 25 ML of acid.Then place the acid in a measuring cylinder, to check if the volume is exactly 25 ml.Then collect 25ml of alkali, and do the same as the acid except in a different measuring cylinder.If the acid is Diprotic or Triprotic, and you are reacting it with a Monoprotic alkali then you must use double or triple the volume of alkali in ratio to the amount of acid. This is to compensate for the extra H+ ions, which if not compensated for would result in an unfair experiment.Measure the temperature for both acid and alkali and note the value down.Then pour both into a beaker with the thermometer in the polystyrene cup as well and seal the cup with the lid quickly and carefully.Record the temperature rise and perform the experiment two more times. Perform this experiment for the rest of the acids, remembering to repeat it 3 times altogether for each acid.Results for main experimentAcidAlkaliInitial Acid Temp. à ¯Ã‚ ¿Ã‚ ½CInitial Alkali Temp. à ¯Ã‚ ¿Ã‚ ½CFinal Temp. à ¯Ã‚ ¿Ã‚ ½CAverage Acid Temp. à ¯Ã‚ ¿Ã‚ ½CAverage Alkali Temp. à ¯Ã‚ ¿Ã‚ ½CAverage Initial Temp. Of Acid + Alkali à ¯Ã‚ ¿Ã‚ ½CAverage of Final Temp. à ¯Ã‚ ¿Ã‚ ½CTemp. Rise à ¯Ã‚ ¿Ã‚ ½C123123123SulphuricSodium Hydroxide21.020.020.022.020.021.032.031.032.020.321.020.731.711.0NitricSodium Hydroxide21.021.021.021.021.021.028.028.028.021.021.021.028.07.0HydrochloricSodium Hydroxide19.019.019.019.020.019.028.027.028.019.019.319.227.78.5EthanoicSodium Hydroxide20.020.020.021.021.020.027.027.027.020.020.720.327.06.7MethanoicSodium Hydroxide19.018.019.020.020.021.027.026.025.018.720.319.526.06.5CitricSodium Hydroxide19.019.019.019.019.019.028.028.028.019.019.019.028.09.0AnalysisAs I predicted for the actual experiments results, the stronger acids reacted to give a bigger temperature than compared to the weaker acids. However, this was not the case for all of the acids used. Citric acid gave a very high reading of temperature change when it is known that it isnt a very strong acid when compared with HCL and Nitric acid. But one should also take into account of the high volume citric acid used in reacting with the sodium hydroxide, as 75 cm(squared) of the citric acid were used to compensate for the fact that it is a Triprotic acid, as if the acid is Diprotic or Triprotic, and you are reacting it with a Monoprotic alkali (sodium hydroxide one molar in this case) then you must use double or triple the volume of alkali in ratio to the amount of acid. This is to compensate for the extra H+ ions, which if not compensated for would result in an unfair experiment.The temperature change for sulphuric acid was recorded as being high, as was expected. As predicted the stronger acids gave higher temperature changes. This is due to the fact that stronger acids produce a higher temperature rise because, first of all, they have no bonds to be broken; in solution they exist as their component ions, completely dissociated. It is known that the breaking of bonds causes energy to be taken in, and when bonds are made, energy is given out. Another reason for a stronger acid producing a higher value for the heat of neutralisation is because it has more free H+ ions. I have deduced this because it is known that in a strong acid, all of the molecules are dissociated into their component ions. When the strong acid is used to neutralise the alkali, a more vigorous reaction would occur as a result of there being more H+ ions in the so lution to neutralise the OH- ions in the alkali to give out more heat.To aid my evaluation of my results I have calculated the enthalpy changes for each of the acids used. I will compare these results with the change in kelvin results.AcidAverage temperature change/KelvinSpecific Heat CapacityMass/grams (including alkali)Energy change in JoulesSulphuric11.04.250.02310.0Nitric7.04.250.01470.0Hydrochloric8.54.250.01785.0Ethanoic6.74.250.01407.0Methanoic6.54.250.01365.0Citric9.04.2100.03780.0Change in Joules GraphChange in Kelvin results graphFurther AnalysisThe graphs for both change in Kelvin and Joules, have very similar patterns. The only difference between both is that Citric acid gives 3780.0 joules, which is 1470.0, more joules than sulphuric acid, which has a higher change in Kelvin than compared to citric acid.The reason for there to be a higher amount of energy maybe due to the fact that a higher volume is used for the citric acid than sulphuric acid, which may link to the fa ct that a higher volume of acid gives a higher enthalpy change.I believe my prediction was partially linked to the results recorded, mainly due to the fact that the weaker acids gave higher readings than expected, like Ethanoic and that the stronger acids gave lower than expected readings, like Hydrochloric acid. Overall I believe my results showed the trend that would be expected.

Essay Sample For Academic Advisement - Make Your Students Writing Process Easy

Essay Sample For Academic Advisement - Make Your Student's Writing Process EasyAn essay sample for academic advising is the most important part of any assignment given to a student. In fact, it is the first step in preparing and planning the assignment. It is imperative that the essay you write should be able to demonstrate your ability to write in a way that people will find interesting.The idea of academic advising has become the norm in schools today. A good essay sample for academic advising can definitely make a difference to whether or not your student get into a college, or if they stay home and work on their homework. With that being said, you need to do everything you can to ensure that your student gets a very high grade in their college essay.It is best to make sure that you have some guidelines set up so that you are making sure that you are giving your students a fair chance to work on their work. The best essay sample for academic advising comes from someone who has alr eady completed college or university work. There are many instances where this is the case. That is why you want to find an essay sample for academic advising that is based on a real life example that was written by someone who actually has what it takes to write an academic essay.Many review papers and analytical essays do not come from someone who has actually gone through the process. Instead, they come from students who have experienced a specific academic matter in school. There are lots of examples of essays that you could look at. However, the key is to find one that is totally based on real life experiences.Students usually do different things, some of which do not relate to college or university life. Some students write about why they love math and science, while others write about how much fun they have at their summer jobs. You have to make sure that you are looking for a composition essay sample that is based on a real life situation. There are also a number of essays t hat are based on personal life. This is what makes them so effective. Students like to be able to get a feel for what life is like for people who are going through the same thing that they are.Other examples of essays that you might want to consider are that of comedy essays. These are usually taken from popular television shows or movies. This is the type of essay that is going to be required for many requirements within the college.It is not hard to find essay samples for academic advising that are based on real life situations. These will come in many different forms such as, real-world interviews or actual interviews with politicians. These types of essay samples are great because they can be easily used in several different assignments, and even multiple college classes.

Siege of Paris in the Franco-Prussian War

Siege of Paris in the Franco-Prussian War The Siege of Paris was fought September 19, 1870 to January 28, 1871 and was a key battle of the Franco-Prussian War (1870-1871). With the beginning of the Franco-Prussian War in July 1870, French forces suffered a string of serious reverses at the hands of the Prussians. Following their decisive victory at the Battle of Sedan on September 1, the Prussians quickly advanced on Paris and encircled the city. Laying siege to city, the invaders were able to contain Paris garrison and defeated several attempted breakout attempts. Seeking to reach a decision, the Prussians began shelling the city in January 1871. Three days later the Paris surrendered. The Prussian triumph effectively ended the conflict and led to the unification of Germany. Background Following their triumph over the French at the Battle of Sedan on September 1, 1870, Prussian forces began marching on Paris. Moving swiftly, the Prussian 3rd Army along with the Army of Meuse encountered little resistance as they neared the city. Personally guided by King Wilhelm I and his chief of staff, Field Marshal Helmuth von Moltke, Prussian troops began encircling the city. Within Paris, the citys governor, General Louis Jules Trochu, had massed around 400,000 soldiers, half of which were untested National Guardsmen. Count Helmuth von Moltke. Photograph Source: Public Domain As the pincers closed, a French force under General Joseph Vinoy attacked Crown Prince Fredericks troops south of the city at Villeneuve Saint Georges on September 17. Attempting to save a supply dump in the area, Vinoys men were driven back by massed artillery fire. The following day the railroad to Orleans was cut and Versailles occupied by the 3rd Army. By the 19th, the Prussians had completely encircled the city beginning the siege. In the Prussian headquarters a debate was had over how best to take the city. Siege of Paris Conflict: Franco-Prussian War (1870-1871)Dates: September 19, 1870-January 28, 1871Armies Commanders:PrussiaField Marshal Helmuth von MoltkeField Marshal Leonhard Graf von Blumenthal240,000 menFranceGovernor Louis Jules TrochuGeneral Joseph Vinoyapprox. 200,000 regularsapprox. 200,000 militiaCasualties:Prussians: 24,000 dead and wounded, 146,000 captured, approximately 47,000 civilian casualtiesFrench: 12,000 killed and wounded The Siege Begins Prussian Chancellor Otto von Bismarck argued in favor of immediately shelling the city into submission. This was countered by the sieges commander, Field Marshal Leonhard Graf von Blumenthal who believed shelling the city to be inhumane and against the rules of war. He also argued that a quick victory would lead to peace before the remaining French field armies could be destroyed. With these in place, it was likely that the war would be renewed in a short time. After hearing arguments from both sides, William elected to allow Blumenthal to proceed with the siege as planned. Within the city, Trochu remained on the defensive. Lacking faith in his National Guardsmen, he hoped that the Prussians would attack allowing his men to fight from within the citys defenses. As it quickly became apparent that the Prussians were not going to attempt to storm the city, Trochu was forced to reconsider his plans. On September 30, he ordered Vinoy to demonstrate and test the Prussian lines west of the city at Chevilly. Striking the Prussian VI Corps with 20,000 men, Vinoy was easily repulsed. Two weeks later, on October 13, another attack was made at Chà ¢tillon. St-Cloud after the fighting at Chà ¢tillon, October 1870. Public Domain   French Efforts to Break the Siege Though French troops succeeded in taking the town from the Bavarian II Corps, they were eventually driven back by Prussian artillery. On October 27, General Carey de Bellemare, commander of the fort at Saint Denis, attacked the town of Le Bourget. Though he had no orders from Trochu to move forward, his attack was successful and French troops occupied the town. Though it was of little value, Crown Prince Albert ordered it retaken and Prussian forces drove the French out on the 30th. With morale in Paris low and made worse by news of the French defeat at Metz, Trochu planned a large sortie for November 30. Consisting of 80,000 men, led by General Auguste-Alexandre Ducrot, the attack struck at Champigny, Creteil and Villiers. In the resulting Battle of Villiers, Ducrot succeeded in driving back the Prussians and taking Champigny and Creteil. Pressing across the Marne River towards Villiers, Ducrot was unable to breakthrough the last lines of Prussian defenses. Having suffered over 9,000 casualties, he was forced to withdraw to Paris by December 3. With food supplies low and communication with the outside world reduced to sending letters by balloon, Trochu planned a final breakout attempt. Prussian troops outside of Paris, 1870.   Bundesarchiv, Bild 183-H26707 / CC-BY-SA 3.0 The City Falls On January 19, 1871, a day after William had been crowned kaiser (emperor) at Versailles, Trochu assaulted the Prussian positions at Buzenval. Though Trochu took the village of St. Cloud, his supporting attacks failed, leaving his position isolated. At the end of the day Trochu was forced to fall back having taken 4,000 casualties. As a result of the failure, he resigned as governor and turned command over to Vinoy. Though they had contained the French, many in the Prussian high command were becoming impatient with the siege and the increasing duration of the war. With the war adversely affecting the Prussian economy and disease beginning to break out on the siege lines, William ordered that a solution be found. On January 25, he directed von Moltke to consult with Bismarck on all military operations. After doing so, Bismarck immediately ordered that Paris be shelled with the armys heavy Krupp siege guns. Following three days of bombardment, and with the citys population starving, Vinoy surrendered the city. Aftermath In the fighting for Paris, the French suffered 24,000 dead and wounded, 146,000 captured, as well as approximately 47,000 civilian casualties. Prussian losses were around 12,000 dead and wounded. The fall of Paris effectively ended the Franco-Prussian War as French forces were ordered to cease fighting following the citys surrender. The Government of National Defense signed the Treaty of Frankfurt on May 10, 1871, officially ending the war. The war itself had completed the unification of Germany and resulted in the transfer of Alsace and Lorraine to Germany.

Why did communist governments rapidly collapse throughout Europe Essay

Why did communist governments rapidly collapse throughout Europe during the late 1980s and early 1990s - Essay Example For instance, US which eventually supported Europe by pushing for democracy with the intention of overthrowing Soviet’s autocratic leadership. The US gained support from the people though its intervention did not help much in liberation of the majority. However, their â€Å"diplomatic† intervention contributed immensely to the communism’s collapse by interfering with its (soviet) leadership. This is evident with the then period’s Reagan doctrine whose core purpose encompassed aiding anticommunist movements. Reagan in his quest to thwart communist’s threats and safeguard US’s interests, he embarked on constructive peacetime strategy that up to date comprise the world’s history. Consequently, this led to signing of subsequent treaties with Soviet aimed at both reducing and shunning any intentions of launching nuclear missiles either in space or land-based (Louka 353). Since, they were detrimental to humanity’s existence (Louka 353 ). This was Reagan’s rapport to destabilize and weaken states that seemed hostile to US’ interests. Therefore, this intervention besides other varied strategies by US undercover utterly rendered Soviet’s regime extremely weak to the extent of not being able to subdue states, which it had conquered. Since, they continued to receive support from outside in form of establishing movements, for instance, Poland’s Solidarity Trade union (Shevel 228). Solidarity in Poland acted as an umbrella of all anticommunist movements in the country whereby its action was immense to the then incumbent regime. Gradually, these Round The table negotiations and strong oppositions emanating from demonstrating workers or movements in varied states led to the collapse of communist system (Shevel 228). Another reason was due to the emergency of nationalism, which not only acted as a democratic project but also an anticommunist force. Nationalism received an immense support especia lly by numerous Communist dominated states that were in quest of liberty and evading Marxist theory. This was democratization process, which received support both from citizens and Polish Catholic Church whereby the latter rejected Soviet way of governance (Muehlenbeck 248). This is because almost all other religions in the state were under the control of Soviet except catholic church that assumed a unique position, hence resulted to offering support to the varied anticommunist movements (nationalism being one of them) (Muehlenbeck 248). Hence, actions of both nationalism and Polish Catholic Church against communist acted as an example to other states that were under the dominion of soviet, which also adopted the same agitation (Muehlenbeck 248). Communist governments in Europe lacked proper strategies both for infrastructure and economic reinvestment. The mainstream regime instead emphasized on military power with the intention of thwarting threats from other global states that sho wed interests in Europe, for instance, US. Poor economic investment yielded to numerous demonstrations especially by workers who cited they were experiencing underpayment besides other varied bad conditions while working. Hence, prompting citizens and powerful movements translate the presence of soviet in Europe did not have any significant impact but to dehumanize the ordinary people. Inadequate economic investment emanated from self-interests that characterized the leaders of the day besides the mainstream soviet regime instead of elevating the ordinary. This fueled the aspect of quick democratization in all states; Poland acting as an example that successfully managed to defy communism (Muehlenbeck 248).

Early twentieth century arts Essay Example | Topics and Well Written Essays - 750 words

Early twentieth century arts - Essay Example The renaissance was a cerebration of the African-American heritage which was expressed through art, music, literature and dance (Watson 19). The Harlem renaissance began to wind down in the year 1929; this was partly caused by the great depression because financial necessities became of more importance than the artistic expression. Great waves, of the African-Americans, travelled to the northern cities so that they may seek employment opportunities in many factories, which were available in response to World War 1. These African-Americans were forced to settle in urban segregated housing, due to the social attitudes of the 20th century, and ended up creating metropolises. This caused that period of artistic and intellectual activity in the African American community, in New York, which finally lead to the Harlem Renaissance (Watson 19). The Harmon foundation was started by one of the many white Americans who expressed interest in the artistic eruption of the black Americans. He established the foundation in the city of New York. The main aim of the foundation was to recognize the African American achievements, in fine arts and also in other fields like, music, farming, relations, literature, race, education, science, religious service and business (Watson 19). Some scholars are today critics of the Harmon foundation. They say that the foundation puts emphasis on the celebration of the African-American cultural achievements and overlooks the difficult living conditions that are found in many black suburbs in urban settings. Many artists have been given support by the Harmon foundation. They include artists such as; Robert Russa Moton, Hale Woodruff, Palmer Hayden, Langston Hughes, Archibald Motley, Countee Cullen and Claude McKay. All the above named artists have all received various awards in fine arts and literature (Watson 19). Jackson’s works of Art

Irish Weddings Essay Example for Free

Irish Weddings Essay Ireland is one country, which is part of the larger United Kingdom (UK). It is a blessed country with numerous greens, which range from the rolling green hills of sheep pasture to the gorgeous gardens as well as ancient castles. Romance is so much embraced by the Irish culture with a lot of passion. The Irish culture allows one to lie in a meadow with his/her love, track down four leaf clovers, or to dance night long to the favorite Irish band. The culture is rich since the Irish is a blend of the old Celtic mythologies and the Christianity brought in by St. Patrick (Haggerty Bridget http://www. irishcultureandcustoms. com/). Therefore in a relationship both backgrounds have a great influence and tradition asks the lovers to be rational and to respect each other as well as their families. The culture demands that Lovers run bare feet through rugged terrain while tumbling in the grass in show of Irish’s love of nature. Irish Church Weddings St. Patrick was an Irish and his most cherished color was blue and until recently the national flag of the Ireland was blue in honor of him. In addition to the love of green, anyone who wishes to do a church wedding must have blue as a theme (Goodwin Audrey, p128). Considering the fact that the Irish are very patient and religious, the names of the bride and bridegroom are first read in church for three consecutive Sundays prior to the wedding day so as to allow the couple to reconsider their decisions as well as also gives others a chance to file an objection for the same. A couple registers in church for marriage three months prior to their wedding day. Irish Claddagh Ring The claddagh ring is very popular among the Irish and was given to the woman by the man as a show of love and faith. (Fielding, p268). This was especially when a man was going away for sometime, either to war or in pursuit for greener pastures to improve their living standards. The ring was worn by the woman to show that she is somebody’s and could be made more personal by using the birthstone of the person to show that it is specifically meant for her. Irish Hand Fasting Before St. Patrick brought Christianity to Ireland, the inhabitants of Ireland believed in paganism and Celtic traditions that was attached with hand fasting. Hand fasting is a form of â€Å"trial marriage† which lasted for a year after which the couple are allowed to decide whether they are compatible to continue or to part ways. Sir Walter Scott as a betrothal day first introduced this day (Fielding, William J. p263). There was no attachments or commitments in hand fasting. Even today hand fasting has been incorporated in marriage ceremonies where the bride and the bridegroom have their hands bound together with ribbons. Irish Wedding Days Of The Week Ladies and gentlemen as you have realized the Irish are very religious and always put God before everything. The days of the week are lanked whereby Saturday is seen as no day. According to their traditions, Weddings cannot be done on Christmas day since it is Jesus birthday nor on Sunday as it is the lords worship day. They argue that the events that occur in wedding ceremonies, which include dancing and partying, are not appropriate during these special days. Some other days of the week like Friday and Saturday are also seen as inappropriate for weddings since the ceremonies can go for 2-3 and can stretch to Sunday. Irish Wedding Months For every situation the Irish have their sayings and concerning wedding months the Irish have the following myths: (Irish church wedding, http://www. romanceclass. com). They believe that the marriage that occurs in the start of the year is loving, kind and true. If one marries during the month of February his/her fate is on the balance but march weddings ends up with both joy and sorrow while those in April bring joy for both the bride and bridegroom. They further believe that to marry in May is a waste of time, To marry in June means that you will be away from each other a lot of time whereas July weddings are linked to struggling so much to make a living. Those marriages in the month of August are associated with many changes in the couple. September weddings on the other hand are linked with both wealth and comfort, whereby love and dynamic riches are for October weddings. In addition, only joy will come in November wedding but deficiency of other things and December is the best month for marriage since they belief that true love will manifest. Irish Love Charms Like the saying goes â€Å"the way to a man’s heart is true the stomach† a woman says the Irish traditional charm as she prepares food for her man. The charm is aimed at bringing the man and the woman closer to each other and makes their love grow each day. The woman longs for everlasting affection from her husband and wishes that her man could give her total attention. Irish traditional songs and lyrics The Irish are known to love songs and dance and this is more pronounced during courtship and marriage ceremonies (Mumphy et al, p126). Locals play flute and drum, fiddle as well as harp while singing helping music, which is full of fun in praise of the bride and bridegrooms. They have a proverb that says â€Å"the most beautiful music of all is the music of what happens† and hence all the music and dance is dedicated to the event of that day. Works cited. Fielding, William J. Strange Customs of Courtship and Marriage. The New Home Library, New York. 2005. P. 263. Goodwin Audrey, Irish-wedding traditions El Cajon, Ca. United States. March 2001 p128. Campbell Georgina, The Best Irish Breads and Baking. Georgina Campbell’s Ireland. 2007. p65 Mumphy, Colin and Donal O’Dea (2006), The Feckin’Book of Everything Irish. NewYork, Barnes and Noble. (2006) p126. irish church wedding accessed online 0n 1st October 2007 http://www. romanceclass. com/weddings/ireland/churcweddingasp. Haggerty Bridget, Irish culture and customs; the humor is on me now. Music for an Irish Wedding reception. jan, 2007. accessed online on 1st October 2007 http://www. irishcultureandcustoms. com/wedding/musicreception. html.

Salt Marshes :: essays research papers

Oceanography  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Salt Marshes Salt marshes are coastal wetlands rich in marine life, which are covered by water at least once per month. They are found in the intertidal zones along low-energy coastlines, forming along the margins of estuaries, where freshwater from the land mixes with seawater. These marshes can be found near the Great South Bay and the Long Island Sound. The entire south shore of Long Island is considered to be a salt marsh important to the health of the marine life. Beginning in Jamaica Bay and extending to Montauk Point, Long Islands salt marches help remove toxic chemicals that are caused by pollution, thus making them a vital part of the eco-system. The Salt Marshes contain different types of grasses that grow out of the water and along the water's edge. This grass can be seen when the tide is low and is covered by water when the tide comes in. This grass helps hold the soil together by dispersing any wave energy and creating a breeding ground for many important marine animals. Also, the plants act as a natural filter, removing any chemicals that might be in the seawater. Some of the plants that are found in salt marshes are: Salt Marsh Grass or Spartina Alterniflora and Cord grass as well as reeds, sedges and golden rod. At low tide, nutrient-rich water flows from the marsh back into the sea, feeding the plankton upon which all other life depends. Peat, which is what the march is mostly made of, is very absorbent. In some areas, it limits coastal flooding by containing the water that comes in during a very high or storm-driven tide. Peat also acts as a filter, cleaning water by removing various compounds and either storing or breaking them down. The salt marsh is also an important breeding ground for many species of marine life. These animals use the marsh and its tall grasses for protection from predators. Some of the marine life is: clams, mussels, shrimp, oysters and small fishes such as killies and spearing. Some mammals use the salt marsh also. These animals include: mice, skunks and many, many species of water fowl. These animals use the marsh not only as a home, but as a place to find food as well. There are destructive forces at work against the salt marsh. While a slowly rising sea level has had some effect, the greatest destruction of salt marshes that has taken place is urban and suburban development. Salt Marshes :: essays research papers Oceanography  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Salt Marshes Salt marshes are coastal wetlands rich in marine life, which are covered by water at least once per month. They are found in the intertidal zones along low-energy coastlines, forming along the margins of estuaries, where freshwater from the land mixes with seawater. These marshes can be found near the Great South Bay and the Long Island Sound. The entire south shore of Long Island is considered to be a salt marsh important to the health of the marine life. Beginning in Jamaica Bay and extending to Montauk Point, Long Islands salt marches help remove toxic chemicals that are caused by pollution, thus making them a vital part of the eco-system. The Salt Marshes contain different types of grasses that grow out of the water and along the water's edge. This grass can be seen when the tide is low and is covered by water when the tide comes in. This grass helps hold the soil together by dispersing any wave energy and creating a breeding ground for many important marine animals. Also, the plants act as a natural filter, removing any chemicals that might be in the seawater. Some of the plants that are found in salt marshes are: Salt Marsh Grass or Spartina Alterniflora and Cord grass as well as reeds, sedges and golden rod. At low tide, nutrient-rich water flows from the marsh back into the sea, feeding the plankton upon which all other life depends. Peat, which is what the march is mostly made of, is very absorbent. In some areas, it limits coastal flooding by containing the water that comes in during a very high or storm-driven tide. Peat also acts as a filter, cleaning water by removing various compounds and either storing or breaking them down. The salt marsh is also an important breeding ground for many species of marine life. These animals use the marsh and its tall grasses for protection from predators. Some of the marine life is: clams, mussels, shrimp, oysters and small fishes such as killies and spearing. Some mammals use the salt marsh also. These animals include: mice, skunks and many, many species of water fowl. These animals use the marsh not only as a home, but as a place to find food as well. There are destructive forces at work against the salt marsh. While a slowly rising sea level has had some effect, the greatest destruction of salt marshes that has taken place is urban and suburban development.