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6.2 Reversible reactions and dynamic equilibrium

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Question 13
H

Hydrogen is manufactured by reacting methane with steam. The forward reaction is endothermic.

CH4(g)+H2O(g)⇌CO(g)+3H2(g)\text{CH}_4(\text{g}) + \text{H}_2\text{O}(\text{g}) \rightleftharpoons \text{CO}(\text{g}) + 3\text{H}_2(\text{g})CH4​(g)+H2​O(g)⇌CO(g)+3H2​(g)

a.

Explain why a high temperature gives a high yield of hydrogen at equilibrium.

[2]
b.

Explain why as low a pressure as possible is used in this reaction.

[3]
Markscheme

6.2 Reversible reactions and dynamic equilibrium Questions

  1. GCSE
  2. /Chemistry
  3. /6.2 Reversible reactions and dynamic equilibrium

40 exam-style questions on AQA GCSE Chemistry 6.2 Reversible reactions and dynamic equilibrium, covering 6.2.1 Reversible reactions, 6.2.2 Energy changes and reversible reactions, 6.2.3 Equilibrium, 6.2.4 The effect of changing conditions on equilibrium, 6.2.5 The effect of changing concentration, 6.2.6 The effect of temperature changes on equilibrium, and 6.2.7 The effect of pressure changes on equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.

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