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A-LevelChemistryEquilibria9701/12 · Feb/Mar 2024 · Q131 Mark

Nitrogen and hydrogen are mixed in a reaction vessel. The reaction reaches equilibrium giving a mixture of nitrogen, hydrogen and ammonia gases. N₂ + 3H₂ ⇌ 2NH₃ The mixture of gases present at equilibrium at a total pressure of 300 atm is shown. gas: nitrogen, number of mol in mixture: 180 gas: hydrogen, number of mol in mixture: 590 gas: ammonia, number of mol in mixture: 160 What is the equilibrium constant, Kp, for the forward reaction?

A6.65 x 10⁻⁶ atm⁻²
B7.13 x 10⁻⁵ atm⁻²
C0.599 atm⁻²
D1.50 x 10⁵ atm⁻²

✓ Correct answer

A: 6.65 x 10⁻⁶ atm⁻²

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About this question

Topic
Equilibria, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source
A-Level Chemistry, Feb/Mar 2024 Paper 1 Variant 2, question 13.

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