O-LevelChemistryRates of Reaction5070/11 · Oct/Nov 2014 · Q181 Mark

The equation shows the reaction for the formation of sulfur trioxide using a catalyst. 2SO2(g) + O2(g) ⇌ 2SO3(g) ΔH = –197 kJ/mol Which change in reaction conditions would produce more sulfur trioxide?

Aadding more catalyst

Bdecreasing the pressure

Cincreasing the temperature

Dremoving some sulfur trioxide

✓ Correct answer

D: removing some sulfur trioxide

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Topic: Rates of Reaction, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2014 Paper 1 Variant 1, question 18.

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