Essential Chemistry for IGCSE - Chemical Reactions (Section 3 - No. 50)
Consider the reaction: 2SO₂(g) + O₂(g) ⇌ 2SO₃(g) ΔH < 0. If the temperature is increased, what will happen to the equilibrium?
The equilibrium shifts to the left.
The equilibrium shifts to the right.
The equilibrium remains unchanged.
The reaction rate becomes zero.
Explanation
Since the reaction is exothermic, increasing the temperature favors the endothermic reverse reaction, shifting the equilibrium to the left.
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