A-LevelChemistryEquilibria9701/12 · May/June 2015 · Q91 Mark

When a sample of HI is warmed to a particular temperature the equilibrium below is established. 2HI(g) ⇌ H₂(g) + I₂(g) At this temperature, it is found that the partial pressure of HI(g) is 28 times the partial pressure of H₂(g). What is the value of Kp at this temperature?

A1.28 × 10⁻³

B0.035

C28

D784

✓ Correct answer

A: 1.28 × 10⁻³

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Topic: Equilibria, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2015 Paper 1 Variant 2, question 9.

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