O-LevelChemistryRates of Reaction5070/12 · Oct/Nov 2017 · Q201 Mark

Sulfur trioxide is produced by the following reaction. 2SO2(g) + O2(g) ⇌ 2SO3(g) ΔΗ = –195 kJ Which change in conditions would produce a greater amount of SO3 at equilibrium?

Aadding a catalyst

Bincreasing the pressure

Cincreasing the temperature

Dremoving some SO2 and O2

✓ Correct answer

B: increasing the pressure

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Topic: Rates of Reaction, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2017 Paper 1 Variant 2, question 20.

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