Question detail
What is the trade-off between the rate of production and equilibrium yield in the Haber process?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
The Haber process and the use of NPK fertilisers
Question
What is the trade-off between the rate of production and equilibrium yield in the Haber process?
Answer
In the Haber process, increasing the temperature can increase the rate of production of ammonia, but it may decrease the equilibrium yield because the reaction is exothermic. Conversely, lowering the temperature can enhance the equilibrium yield but slows down the reaction rate.
Explanation
A strong answer should directly address the approved learning objective to explain the trade-off between rate of production and equilibrium yield in 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
Rate vs. Yield Confusion
Students often confuse the concepts of rate of production and equilibrium yield, thinking that increasing the rate always increases the yield.
To fix this, students should understand that while a higher rate of production can lead to more product in a shorter time, the equilibrium yield is determined by the reaction conditions and the position of equilibrium, which may not change with rate.
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