In which of the following reactions, increase in pressure will favour the forward reaction?

Question

In which of the following reactions, increase in pressure will favour the forward reaction? (A) P C l5(g) leftharpoons P C l3(g)+C l2(g) (B) 2 NO (g)+ O 2(g) leftharpoons 2 NO 2(g) (C) C ( s )+ H 2 O (g) leftharpoons CO (g)+ H 2(g) (D) 2 H I(g) leftharpoons H2(g)+I2(g)

Tardigrade Admin · Accepted Answer

underset2 mol2 NO + underset1 mol O 2 leftharpoons underset2 mol2 NO 2(g) If Δ n=0, no effect on equilibrium due to pressure. Δ n>0, the increase in pressure favours backward reaction, Δ n<0, the increase in pressure favours forward reaction for [a] Δ n=np-nr=2-1=1, [ b ] Δ n=2-3=-1 [ c ] Δ n=2-1=1 [ d ] Δ n=2-2=0 Hence, in case of [b] An <0, the increase in pressure will favour the forward reaction.

Q. In which of the following reactions, increase in pressure will favour the forward reaction?

$PC l_{5} (g) ⇌ PC l_{3} (g) + C l_{2} (g)$

$2 NO (g) + O_{2} (g) ⇌ 2 N O_{2} (g)$

$C (s) + H_{2} O (g) ⇌ CO (g) + H_{2} (g)$

$2 H I (g) ⇌ H_{2} (g) + I_{2} (g)$

Q. In which of the following reactions, increase in pressure will favour the forward reaction?

PCl5​(g)⇌PCl3​(g)+Cl2​(g)

2NO(g)+O2​(g)⇌2NO2​(g)

C(s)+H2​O(g)⇌CO(g)+H2​(g)

2HI(g)⇌H2​(g)+I2​(g)

$PC l_{5} (g) ⇌ PC l_{3} (g) + C l_{2} (g)$

$2 NO (g) + O_{2} (g) ⇌ 2 N O_{2} (g)$

$C (s) + H_{2} O (g) ⇌ CO (g) + H_{2} (g)$

$2 H I (g) ⇌ H_{2} (g) + I_{2} (g)$