Coal can be used to generate hydrogen gas (a potential fuel) by the following endothermic reaction:

C(s)+H2O(g) ⇌ CO(g)+H2(g)C(s)+H2O(g)⇌CO(g)+H2(g)

If this reaction mixture is at equilibrium, predict whether each of the following will result in the formation of additional hydrogen gas, result in the formation of less hydrogen gas, or have no effect on the quantity of hydrogen gas.

(a) adding more C to the reaction mixture
(b) adding more H2O to the reaction mixture
(c) raising the temperature of the reaction mixture
(d) increasing the volume of the reaction mixture
(e) adding a catalyst to the reaction mixture
(f) adding an inert gas to the reaction mixture