Consider this reaction at equilibrium: 2SO2(g) + O2(g) ⇌ 2SO3 (g), △H°rxn = -198 kJ/mol If the volume of the system is compressed at a constant temperature, what change will occur in the position of the equilibrium?   a. No change b. A shift to produce more SO3 c. A shift to produce more SO2 d. A shift to produce more O2

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