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5.3 Equilibria

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Question 14
H

Hydrogen is made by reacting methane with steam.

CH4(g)+H2O(g)⇌CO(g)+3H2(g) \mathrm{CH_{4}(g) + H_{2}O(g) \rightleftharpoons CO(g) + 3H_{2}(g)} CH4​(g)+H2​O(g)⇌CO(g)+3H2​(g)

The forward reaction is endothermic.

Which conditions would give the greatest yield of hydrogen at equilibrium?

[1]
A

500 ∘C500\,^\circ\mathrm{C}500∘C and 5 atmospheres

B

500 ∘C500\,^\circ\mathrm{C}500∘C and 30 atmospheres

C

900 ∘C900\,^\circ\mathrm{C}900∘C and 5 atmospheres

D

900 ∘C900\,^\circ\mathrm{C}900∘C and 30 atmospheres

Markscheme

5.3 Equilibria Questions

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

47 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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