Question

What is the value of DeltaG in a spontaneous reaction

Answer 1

Gibbs free energy of a reaction ( Δ G  ) is the change in free energy of a system that undergoes the chemical reaction. It is the energy associated with the reaction, which is available to do some useful work. If      ΔG<0 , then the reaction can be utilized to do some useful work. If   ΔG>0 , then work has to be done on the system or external energy is required to make the reaction happen. ΔG=0  when the reaction is at equilibrium and there is no net change taking place in the system.

Answer 2

I believe  that DeltaG is negative for a spontaneous reaction.