A-LevelChemistryReaction kinetics9701/12 · Oct/Nov 2020 · Q111 Mark

Ammonia is made by the Haber process. The reactants are nitrogen and hydrogen. N₂(g) + 3H₂(g) ⇌ 2NH₃(g) ΔH is negative What will increase the rate of the forward reaction?

Aadding argon to the mixture but keeping the total volume constant

Bdecreasing the temperature

Cincreasing the total pressure by reducing the total volume at constant temperature

Dremoving ammonia as it is made but keeping the total volume of the mixture the same

✓ Correct answer

C: increasing the total pressure by reducing the total volume at constant temperature

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Topic: Reaction kinetics, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2020 Paper 1 Variant 2, question 11.

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