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6.2 Reversible reactions and dynamic equilibrium

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Question 12

Methanol is made from carbon monoxide and hydrogen in a sealed container.

CO(g)+2H2(g)⇌CH3OH(g)\text{CO(g)} + 2\text{H}_2\text{(g)} \rightleftharpoons \text{CH}_3\text{OH(g)}CO(g)+2H2​(g)⇌CH3​OH(g)

The mixture is at equilibrium. The pressure is lowered while the temperature remains constant.

Which statement about the new equilibrium is correct?

[1]
A

It shifts to the left, increasing the amounts of carbon monoxide and hydrogen

B

It shifts to the left, because the forward reaction stops at a lower pressure

C

It does not shift, because all the substances in the mixture are gases

D

It shifts to the right, increasing the amount of methanol

Markscheme

6.2 Reversible reactions and dynamic equilibrium Questions

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

109 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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