## relationship between G and Gnot

$\Delta G^{\circ}= \Delta H^{\circ} - T \Delta S^{\circ}$

$\Delta G^{\circ}= -RT\ln K$

$\Delta G^{\circ}= \sum \Delta G_{f}^{\circ}(products) - \sum \Delta G_{f}^{\circ}(reactants)$

JasmineChavez 1E
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Joined: Fri Sep 25, 2015 3:00 am

### relationship between G and Gnot

If G products= G reactants then how is there a difference between the standard energies of the two that gives us the equation deltaG=-RT lnK ?

Chem_Mod
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### Re: relationship between G and Gnot

Standard Gibb's free energy ($\Delta G^{\circ}$) and the Gibb's free energy under the specific reaction conditions ($\Delta G$) are different quantities related through the equation $\Delta G=\Delta G^{\circ}+RTln(Q)$. The reaction can be at equilibrium ($\Delta G=0$), but the values of $\Delta G^{\circ}$ will still be the same regardless of reaction conditions since they are by definition the values under standard conditions.