O-LevelChemistryRates of Reaction5070/11 · May/June 2017 · Q181 Mark

The equation shows the formation of sulfur trioxide in the contact process. 2SO2(g) + O2(g) ⇌ 2SO3(g) ΔH = –196 kJ/mol What would decrease the yield of sulfur trioxide?

Aaddition of more oxygen

Ban increase in pressure

Can increase in temperature

Dremoval of sulfur trioxide from the reaction chamber

✓ Correct answer

C: an increase in temperature

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Topic: Rates of Reaction, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2017 Paper 1 Variant 1, question 18.

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