Question detail
Describe the role of temperature in the Haber process and its effect on the yield of ammonia.
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At a glance
Question
Type
exam_style
Style
Topic
The Haber process and the use of NPK fertilisers
Question
Describe the role of temperature in the Haber process and its effect on the yield of ammonia.
Answer
In the Haber process, increasing the temperature shifts the equilibrium position to favor the endothermic reaction, which is the decomposition of ammonia. This results in a lower yield of ammonia. Therefore, a compromise temperature is used to balance the rate of reaction and the yield of ammonia.
Explanation
A strong answer should directly address the approved learning objective to apply dynamic equilibrium ideas to the Haber process. (HT only; Chemistry only). This question belongs to The Haber process within The Haber process and the use of NPK fertilisers, so the response should use that exact curriculum context rather than a generic statement. The answer is correct when it names the key idea, explains the link to chemistry only, and keeps the wording specific to AQA GCSE revision.
Common mistake
Misunderstanding Dynamic Equilibrium
Students often confuse dynamic equilibrium with static equilibrium, thinking that the concentrations of reactants and products remain constant without any reaction occurring.
Dynamic equilibrium involves ongoing reactions where the rate of the forward reaction equals the rate of the reverse reaction, leading to constant concentrations of reactants and products.
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