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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 reversible reaction.

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)

For the amounts shown in the equation, the backward reaction takes in 91 kJ of energy.

Which statement describes the forward reaction?

[1]
A

It is exothermic and gives out 91 kJ91\ \text{kJ}91 kJ of energy

B

It is endothermic and takes in 91 kJ91\ \text{kJ}91 kJ of energy

C

It is exothermic and gives out less than 91 kJ91\ \text{kJ}91 kJ of energy

D

It is endothermic and takes in less than 91 kJ91\ \text{kJ}91 kJ of energy

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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