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In this reaction the forward reaction, the one making the ammonia, is exothermic meaning it gives off heat when it reacts and heats up the surroundings. The backward reaction is endothermic meaning it takes energy from the surroundings to break the bonds between the Nitrogen and Hydrogen. The exothermic reaction is making bonds. (If you need something to remember this by, snap something. You need to put energy in to break it so breaking chemical bonds needs energy put into it. Endothermic.) If you heat the reactants you are putting energy in so you are increasing the endothermic reaction which is the one breaking the bonds between the Nitrogen and Hydrogen. So by increasing the amount of ammonia that has been broken by heating the reactants and increasing the backward reaction you decrease your yield (the amount of ammonia you get at the end).
What else can I help you with?
How would the yield of ethanol at equilibrium change if the temperature was increased?
If you raise the temperature, the endothermic reaction will increase to use up the extra heat, therefore producing less percentage yield of ethanol and more of ethene and steam.
How can the yield of ammonia be increased?
To increase the yield of ammonia in the Haber process, you can: Increase the pressure: Higher pressure shifts the equilibrium towards the product side, increasing the amount of ammonia produced. Optimize the temperature: Lower temperatures are favorable for ammonia production, but it’s a balance to prevent the reaction from being too slow. Use a suitable catalyst: Iron catalysts are commonly used to speed up the reaction without being consumed. Optimize the ratio of reactants: Ensuring the ideal ratio of nitrogen and hydrogen in the reaction mixture can also improve the yield of ammonia.
How does high pressure increase percentage yield of ammonia?
Increasing the pressure for the Haber process when producing ammonia can increase the percentage yield by shifting the equilibrium towards the formation of ammonia, as predicted by Le Chatelier's principle. This is because ammonia is produced when the system is under high pressure, promoting the forward reaction.
What effect does increasing pressure have on the yield of ammonia in the Haber process?
It increases the yield. 3 moles of hydrogen react with one mole of nitrogen to produce two moles of ammonia. As there is a REDUCTION in molecules, there will be a reduction in pressure. This is alsos an equilibrium reaction. So by Le Chetalier's principle, if we increase pressure, the system will react to reduce the pressure again. This can be done by producing more ammonia - in other words, an increase in product yield.
Why you add calcium oxide when making ammonia?
Calcium oxide is added in the Haber process for ammonia production as it acts as a desiccant to absorb any moisture present in the reactants, which can lower the efficiency of the process. By removing moisture, the equilibrium shift in the reaction favors the production of more ammonia, thus increasing the overall yield.
Why does the yield of ammonia at equllibrium increase as the temperature is decreased?
When the temperature is decreased, the reverse reaction (in this case, the decomposition of ammonia into nitrogen and hydrogen) is favored because it is an exothermic reaction. In response to the increased reverse reaction, the forward reaction (formation of ammonia from nitrogen and hydrogen) increases to re-establish equilibrium, ultimately leading to a higher yield of ammonia.
How would a decrease in temperature affect the yield of ammonia?
A decrease in temperature would decrease the yield of ammonia as the reaction to produce ammonia is exothermic, meaning it releases heat. At lower temperatures, the equilibrium shifts to favor the reactants, resulting in lower ammonia production.
What happens to the yield of ammonia when the concentration of reactant is increased?
Increasing the concentration of reactants typically increases the yield of ammonia. According to Le Chatelier's principle, the equilibrium will shift to the right to counteract the increase in reactant concentration, favoring the production of more ammonia.
How will a change in pressure and concentration affect the yield of ammonia made?
An increase in pressure will favor the production of ammonia since it reduces the volume of gas molecules on the product side, shifting the equilibrium towards ammonia formation. An increase in concentration of reactants will also favor ammonia yield by Le Chatelier's principle, as more reactants will be available for the forward reaction.
How would the yield of ethanol at equilibrium change if the temperature was increased?
If you raise the temperature, the endothermic reaction will increase to use up the extra heat, therefore producing less percentage yield of ethanol and more of ethene and steam.
Why are high temperature and pressure needed for the harbor process?
High temperature and pressure are needed for the Haber process because they help improve the reaction rate and equilibrium yield of ammonia. The increased temperature allows for more collisions between reactant molecules, while high pressure helps to favor the formation of ammonia by reducing the volume of the gas mixture.
What is equilibrium yield?
Equilibrium yield is the maximum amount of product that can be obtained in a chemical reaction when the forward and reverse reactions occur at equal rates. It is the point where the concentrations of reactants and products remain constant. It is reached when the forward and reverse reactions reach a balance.
How can the yield of ammonia be increased?
To increase the yield of ammonia in the Haber process, you can: Increase the pressure: Higher pressure shifts the equilibrium towards the product side, increasing the amount of ammonia produced. Optimize the temperature: Lower temperatures are favorable for ammonia production, but it’s a balance to prevent the reaction from being too slow. Use a suitable catalyst: Iron catalysts are commonly used to speed up the reaction without being consumed. Optimize the ratio of reactants: Ensuring the ideal ratio of nitrogen and hydrogen in the reaction mixture can also improve the yield of ammonia.
How does high pressure increase percentage yield of ammonia?
Increasing the pressure for the Haber process when producing ammonia can increase the percentage yield by shifting the equilibrium towards the formation of ammonia, as predicted by Le Chatelier's principle. This is because ammonia is produced when the system is under high pressure, promoting the forward reaction.
How does the concentration affect the rate and yield of ammonia?
Increasing the concentration of reactants typically increases the rate of ammonia production. However, it may not necessarily increase the yield of ammonia as the equilibrium position can be shifted depending on the reaction conditions. Increasing the concentration of reactants can favor the forward reaction, leading to higher yields of ammonia in some cases.
When 300g of ammonia reacted with excess sulfuric acid to produce ammonium sulfate 985 g of product were obtained what is the percent yield of ammonium sulfate for this reaction?
The theoretical yield of ammonium sulfate can be calculated based on the amount of ammonia used. To find the percent yield, divide the actual yield (985 g) by the theoretical yield and multiply by 100. Percent yield = (actual yield / theoretical yield) x 100.
When 500g of ammonia reacted with excess sulfuric acid to produce ammonium sulfate 1789g of product were obtained What is the percent yield of ammonium sulfate for this reaction?
The theoretical yield of ammonium sulfate can be calculated by determining the amount that would be produced if all the ammonia reacted. Given that 500g of ammonia was used, convert this amount to grams of ammonium sulfate. Then, divide the actual yield (1789g) by the theoretical yield and multiply by 100 to calculate the percent yield.
