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Chemistry Question on Equilibrium

The reaction quotient (Q) for the reaction N2(g)+3H2(g)⇋2NH3(g)N_2(g) + 3H_2(g)⇋2NH_3(g) is given by Q=[NH3]2[N2][H2]3Q =\frac { [NH_3]^2}{[N_2][H_2]^3}. The reaction will proceed from right to left if: (where KC is the equilibrium constant)

A

Q=KC

B

Q

C

Q>KC

D

Q=0

Answer

Q>KC

Explanation

Solution

N2(g)+3H2(g)⇋2NH3(g)N_2(g) + 3H_2(g)⇋2NH_3(g)
equilibrium constant (Kc) is:
Kc=[NH3]2[N2][H2]3K_c =\frac { [NH_3]^2}{[N_2][H_2]^3}
The reaction will proceed in backward direction, when Q>Kc.
The product concentration is more than equilibrium value.
The reactant concentration is less than the equilibrium value.

So, the correct option is (C): Q>Kc