Question

If enthalpy change for a reaction is zero, then ∆G° equals to _____________

(a) -T∆S°

(b) T∆S°

(c) -∆H°

(d) lnkeq

I had been asked this question in an interview for internship.

Question is taken from Bioenergetics and Thermodynamics in portion Principles of Bioenergetics and Glycolysis of Biochemistry

Answer 1

The correct answer is (a) -T∆S°

Easy explanation: From the equation, ∆G° = ∆H°-T∆S°

If  ∆H° = 0 then ∆G° = -T∆S°.