The water-gas shift reaction co (g) + h2o (g) ⇌co2 (g) + h2 (g) is used industrially to produce hydrogen. the reaction enthalpy is δh∘=-41kj. to increase the equilibrium yield of hydrogen would you use high or low temperature?

We can't expand the equilibrium yield of hydrogen by controlling the weight of this response. This is a reversible response in equilibrium. You have 2 mol or 2 volumes of reactants and 2 mol or 2 volumes of item. For this situation weight has no impact on the balance or the yield of H2.