The incorrect expression among the following is:

$\frac{\Delta \mathrm{G}_{\text {System }}}{\Delta \mathrm{S}_{\text {Total }}}=-\mathrm{T}($ at constant $\mathrm{P})$

$\ln \mathrm{K}=\frac{\Delta \mathrm{H}^{\circ}-\mathrm{T} \Delta \mathrm{S}^{\circ}}{\mathrm{RT}}$

$\mathrm{K}=\mathrm{e}^{-\Delta \mathrm{G}^{\circ} / \mathrm{RT}}$

For isothermal process $\mathrm{w}_{\text {reversible }}=-\mathrm{nRT} \ln \frac{\mathrm{V}_{f}}{\mathrm{~V}_{i}}$