39. For the reaction, N2(g)+3H2(g)2NH3(g)

Equilibrium constant, Kc=[NH3]2[N2][H2]3

Some reaction are written below in Column I and their equilibrium constants in terms of Kc are written in Column II. Match the following reactions with the corresponding equilibrium constant.

Column I

(Reaction)

Column II

(Equilibrium constant)

A. 2N2(g)+6H2(g)4NH3(g)

1. 2Kc

B. 2NH3(g)2N2(g)+3H2(g)

2. Kc1/2

C. 12N2(g)+32H2(g)NH3(g)

3. 1Kc

 

4. Kc2

A.(4) B.(3) C.(2)
For the reaction, N2(g)+3H2(g)2NH3(g)
Equilibrium constant Kc=[NH3]2[N2][H2]3
A. The given reaction 2N2(g)+6H2(g)4NH3(g) is twice the above reaction. Hence, K=Kc2
B. The reaction 2NH3(g)2N2(g)+3H2(g) is reverse of the above reaction. Hence, K=1Kc'
C. The reaction 12N2(g)+32H2(g)NH3(g) is half of the above reaction. Hence, K=Kc=Kc1/2