Question
Does the number of moles of reaction products increase, decrease or remain same when each of the following equilibria is subjected to a decrease in pressure by increasing the volume?
$\text{3Fe}\text{ (S) + }\text{4H}_2\text{O (g)}\rightleftharpoons\text{Fe}_3\text{O}_4\text{ (S) + 4H}_2\text{ (g)}$
$\text{3Fe}\text{ (S) + }\text{4H}_2\text{O (g)}\rightleftharpoons\text{Fe}_3\text{O}_4\text{ (S) + 4H}_2\text{ (g)}$