Question

In a reaction, if the value of Gibbs free energy is greater than zero what does it infer?

(a) K is greater than 1

(b) K is less than 1

(c) K is equal to 1

(d) Cannot deduce K from Gibbs free energy

The question was asked in a job interview.

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

Answer 1

The correct option is (b) K is less than 1

Easiest explanation: If the value of Gibbs free energy is greater than the zero that means, -ΔG0/RT is negative and that e^-ΔG0/RT is greater than 1, so the K is greater than 1 this means the reaction is nonspontaneous and proceeds in the forward direction.