For the equilibrium: CO(g) + H₂O(g) ⇌ CO₂(g) + H₂(g), ΔH = -41 kJ/mol. How can the yield of H₂ be increased?

By decreasing the temperature.
By increasing the temperature.
By increasing the pressure.
By using a catalyst.

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The reaction is exothermic. According to Le Chatelier’s principle, lowering the temperature shifts the equilibrium to the product side (right) to release heat. Pressure has no effect as the number of gas moles is the same on both sides.

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