Question

What happens when reaction quotient is equal to the equilibrium constant?

(a) the reaction proceeds in the forward direction

(b) the reaction proceeds in the backward direction

(c) the reaction reaches equilibrium

(d) cannot predict

I got this question in exam.

This question is from Relationship between Equilibrium Constant K, Reaction Quotient Q and Gibbs Energy G in division Equilibrium of Chemistry – Class 11

Answer 1

Correct answer is (c) the reaction reaches equilibrium

Explanation: When Gibbs free energy is zero, the reaction reaches equilibrium and at equilibrium, the reaction quotient is replaced by the equilibrium constant, as both the values are equal. That is when reaction quotient is equal to the equilibrium constant reaction reaches equilibrium.