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10.4 The Haber process and the use of NPK fertilisers

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Question 4
H

The equation for the reaction in the Haber process is:

N2+3H2⇌2NH3\text{N}_2 + 3\text{H}_2 \rightleftharpoons 2\text{NH}_3N2​+3H2​⇌2NH3​

The forward reaction is exothermic.

a.

Explain why increasing the pressure increases the yield of ammonia at equilibrium.

[2]
b.

A pressure of about 200 atmospheres is used rather than a much higher pressure. Explain why.

[2]
c.

Explain why increasing the temperature decreases the yield of ammonia at equilibrium.

[2]
Markscheme

10.4 The Haber process and the use of NPK fertilisers Questions

  1. GCSE
  2. /Chemistry
  3. /10.4 The Haber process and the use of NPK fertilisers

39 exam-style questions on AQA GCSE Chemistry 10.4 The Haber process and the use of NPK fertilisers, covering 10.4.1a The Haber process, 10.4.1b Equilibrium and rate in the Haber process, and 10.4.2 Production and uses of NPK fertilisers. Each one has a worked solution and a mark scheme showing where the marks go.

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