The reaction favoured at low pressure is

Question

The reaction favoured at low pressure is (A) H 2(g)+ I 2(g) leftharpoons 2 HI (g) (B) PCl 5(g) leftharpoons PCl 3(g)+ Cl 2(g) (C) N 2(g)+ O 2(g) leftharpoons 2 NO (g) (D) N 2(g)+3 H 2(g) leftharpoons 2 NH 3(g)

Tardigrade Admin · Accepted Answer

At equilibrium, low pressure favours those reactions which are accompained by increase in total number of moles and high pressure favours those reactions which take place with decrease in total number of moles. However, pressure has no effect on an eqilibrium reaction which proceeds with no change in total number of moles.
Hence, reaction

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

is favoured by low pressure.

Q. The reaction favoured at low pressure is

$H_{2} (g) + I_{2} (g) ⇌ 2 H I (g)$

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

$N_{2} (g) + O_{2} (g) ⇌ 2 NO (g)$

$N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g)$

Q. The reaction favoured at low pressure is

H2​(g)+I2​(g)⇌2HI(g)

PCl5​(g)⇌PCl3​(g)+Cl2​(g)

N2​(g)+O2​(g)⇌2NO(g)

N2​(g)+3H2​(g)⇌2NH3​(g)

$H_{2} (g) + I_{2} (g) ⇌ 2 H I (g)$

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

$N_{2} (g) + O_{2} (g) ⇌ 2 NO (g)$

$N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g)$