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5.3 Equilibria

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Question 50

Methane is made from carbon dioxide and hydrogen in a closed reactor.

CO2(g)+4H2(g)⇌CH4(g)+2H2O(g) \mathrm{CO_{2}(g) + 4H_{2}(g) \rightleftharpoons CH_{4}(g) + 2H_{2}O(g)} CO2​(g)+4H2​(g)⇌CH4​(g)+2H2​O(g)

The forward reaction is exothermic.

Which pair of changes increases the yield of methane at equilibrium?

[1]
A

Decrease the temperature and decrease the pressure

B

Increase the temperature and increase the pressure

C

Decrease the temperature and increase the pressure

D

Increase the temperature and decrease the pressure

Markscheme

5.3 Equilibria Questions

  1. GCSE
  2. /Chemistry
  3. /5.3 Equilibria

124 exam-style questions on OCR GCSE Chemistry 5.3 Equilibria, covering 5.3.1 Reversible reactions and dynamic equilibrium and 5.3.2 Changing the position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.

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