Essential Chemistry for IGCSE - Chemical Reactions (Section 3 - No. 2)
What will be the effect of decreasing the pressure on the following reaction? 2SO2(g) + O2(g) ⇌ 2SO3(g)
The equilibrium shifts to the right.
The equilibrium shifts to the left.
There is no effect on the equilibrium.
The reaction rate increases.
Explanation
Decreasing the pressure favors the direction with more moles of gas; this is to the left in this case.
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