Question

Which of the following is correct for the reaction?
N₂ (g) + 3H₂ (g) ⇋ 2NH₃(g)
(a) Kₚ = K꜀
(b) Kₚ < K꜀
(c) Kₚ > K꜀
(d) Pressure is required to predict the correlation

Answer 1

Answer:

pressure is required to predict the correlation

Answer 2

For the given reaction,

N₂ (g) + 3H₂ (g) ⇋ 2NH₃(g), the correct option is :

(b) Kₚ < K꜀

1. We know that

Kₚ=K꜀. (RT)^∆n ( from laws of equilibrium ) where ∆n is the change in the moles from reactants to products.

2. In this reaction we see that

∆n= 2 - (3+1)

= 2- 4

= - 2

3. Thus, putting in above equation, we get

Kₚ=K꜀. (RT)^ (-2)

Kₚ=K꜀./(RT)^2

Kₚ.(RT)^2=K꜀

4. Thus, we see that K꜀is greater than Kₚ

i.e, Kₚ<K꜀

5. Thus (b) is the correct answer.