Essential Chemistry for IGCSE - Chemical Reactions (Section 2 - No. 10)
Consider the reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g) ΔH = -198 kJ/mol. Which conditions favor the formation of SO3?
Increasing the temperature and decreasing the pressure.
Increasing the temperature and increasing the pressure.
Decreasing the temperature and decreasing the pressure.
Decreasing the temperature and increasing the pressure.
Explanation
Exothermic reactions are favored by lower temperatures. Higher pressure favors fewer gas molecules.
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