-->

Equilibrium

Question
CBSEENCH11006401

Does the number of moles of reaction products increase, decrease or remain the same when each of the following equilibria is subjected to a decrease in pressure by increasing the volume?
left parenthesis straight a right parenthesis space PCl subscript 5 left parenthesis straight g right parenthesis space space space rightwards harpoon over leftwards harpoon space space space space PCl subscript 3 left parenthesis straight g right parenthesis space plus space Cl subscript 2 left parenthesis straight g right parenthesis
left parenthesis straight b right parenthesis space CaO left parenthesis straight s right parenthesis space plus space CO subscript 2 left parenthesis straight g right parenthesis space space space rightwards harpoon over leftwards harpoon space space space space CaCO subscript 3 left parenthesis straight s right parenthesis
left parenthesis straight c right parenthesis space 3 Fe left parenthesis straight s right parenthesis space plus space 4 straight H subscript 2 straight O left parenthesis straight g right parenthesis space space space rightwards harpoon over leftwards harpoon space space space Fe subscript 3 straight O subscript 4 left parenthesis straight s right parenthesis space plus space 4 straight H subscript 2 left parenthesis straight g right parenthesis

Solution

According to Le Chatelier’s principle, on decreasing the pressure, moles of reaction products will:
(a) increase
(b) decrease
(c) remain the same.
[∵ np = nr gaseous)