Question

If the value of Gibbs free energy for a reaction is 20J/mol, the reaction is ___________

(a) spontaneous

(b) nonspontaneous

(c) may be spontaneous

(d) may not be spontaneous

I had been asked this question in a job interview.

My enquiry is from Relationship between Equilibrium Constant K, Reaction Quotient Q and Gibbs Energy G topic in section Equilibrium of Chemistry – Class 11

Answer 1

The correct choice is (b) nonspontaneous

For explanation: Is the value of Gibbs free energy for a reaction is 20 J/mol, that means it is positive,  -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.