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?
$\text{CaO}\text{ (S) + }\text{CO}_2\text{ (g)}\rightleftharpoons\text{CaCO}_3\text{ (S)}$
$\text{CaO}\text{ (S) + }\text{CO}_2\text{ (g)}\rightleftharpoons\text{CaCO}_3\text{ (S)}$

