G and Gnaught

[Susanna Givan 2B]

When do we use G and when do we use Gnaught in the problems?

[Simrah_Ahmed1J]

G^o is used when you are talking about the reaction at STANDARD conditions, like 1 M or 1 atm, G is used in other situations.

[Sera Aintablian 2E]

1. deltaG is the change in Gibbs free energy for a system at non-standard conditions. At equilibrium this value is zero.
2. deltaGnaught is the change in Gibbs free energy for a system at standard conditions (298 K, 1 atm pressure (constant P), 1 M concentration of all reactants). This value is not zero at equilibrium.
*The delta Gnaught equation is derived from the deltaG equation, because that value was placed at zero for equilibrium.

[Kelly Yun 2I]

Anything with the naught sign indicates standard conditions! The good explanations above would also apply to things like E vs E naught :)