Which quantity out of `Delta_(r)G` or `Delta_(r)G^(@)` will be zero at equilibrium?

Explanation

`Delta_(r)G^(@)` will be zero.
`Delta_(r)G^(@)` will be zero for K =1 because `Delta_(r)G^(@) = -RT "In "K`
`Delta_(r)G^(@)` will be non-zero for other values of K.