Essential Chemistry for IGCSE - Chemical Reactions (Section 5 - No. 27)
Which of these changes would shift the equilibrium of the reaction: 2SO₂(g) + O₂(g) ⇌ 2SO₃(g) to the left?
Increase in temperature
Increase in pressure
Adding a catalyst
Removing SO₂
Explanation
Since the reaction is exothermic, increasing the temperature will favor the endothermic reverse reaction.
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