Question detail
Why is it important to recycle unreacted nitrogen and hydrogen 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
Why is it important to recycle unreacted nitrogen and hydrogen in the Haber process?
Answer
Recycling unreacted nitrogen and hydrogen in the Haber process is important because it maximizes the efficiency of the process by reducing waste and ensuring that more reactants are converted into ammonia. This practice also helps to lower production costs.
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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