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6.2 Reversible reactions and dynamic equilibrium

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Question 21
H

Hydrogen is manufactured from methane and steam using the reversible reaction shown.

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

Why does a low pressure give a high yield of hydrogen at equilibrium?

[1]
A

There are more molecules of gas on the left of the equation

B

There are more molecules of gas on the right of the equation

C

A low pressure increases the rate of the forward reaction

D

A low pressure lowers the temperature of the reaction mixture

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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