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6.2 Reversible reactions and dynamic equilibrium

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Question 14

Sulfur dioxide reacts reversibly with oxygen to form sulfur trioxide in a sealed vessel. The forward reaction is exothermic. The reaction mixture is allowed to reach equilibrium and is then cooled.

What effect does cooling this mixture have on the oxygen remaining after equilibrium is re-established?

[1]
A

More oxygen is present because cooling favours the exothermic forward reaction.

B

More oxygen is present because cooling favours the endothermic reverse reaction.

C

Less oxygen is present because cooling favours the exothermic forward reaction.

D

Less oxygen is present because cooling favours the endothermic reverse reaction.

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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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