Essential Chemistry for IGCSE - Chemical Reactions (Section 2 - No. 6)
In the reversible reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g), which of the following statements is/are correct regarding a decrease in volume?
The equilibrium shifts to the right.
The equilibrium shifts to the left.
The reaction rate increases.
The equilibrium remains unchanged.
Explanation
Decreasing the volume at constant temperature increases the pressure, so the equilibrium will shift towards the side with fewer moles of gas. A reduction in volume increases the rate of reaction.
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