Question

Predict the direction of reaction in equilibrium in each case:
a) KClO3 (s) ---- KCl (s) + O2 (g), (IF pressure is INCREASED.)
b) 3 A (g) + B (s) --- 2C (g), (IF pressure is DECREASED).

Answer 1

According to Lechartle's principle,

If pressure increased the equilibrium will shifts in the direction where volume decreases.

If pressure is decreased the equilibrium will shifts in the direction where volume increases.

(a)KClO3(s) -----> KCl(s) +O2(g)

Number of moles will increased along products side,so upon increasing pressure the equilibrium will shifts towards products side that means forward reaction takes place.

(b)3A(g)+B(s) ------> 2C(g)

Here reactants have more number of moles so upon decreases pressure favours backward reaction that means towards reactants side.