A-LevelChemistryEquilibria9701/12 · May/June 2020 · Q31 Mark

The catalysed formation of ammonia by the Haber process can be represented by the equation shown. N2(g) + 3H2(g) ⇌ 2NH3(g) ΔH = −92 kJ mol⁻¹ Which change in conditions will increase both the rate of formation and the equilibrium yield of ammonia?

Adecrease in the temperature

Bincrease in the temperature

Cincrease in the pressure

Dincrease in the surface area of the catalyst

✓ Correct answer

C: increase in the pressure

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Topic: Equilibria, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2020 Paper 1 Variant 2, question 3.

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