What is Gibbs free energy? How is Gibbs free energy calculated?

1 Answer
anor277
Jun 26, 2017

The "Gibbs Free Energy" is the single unequivocal criterion for the "spontaneity of chemical change....."

Explanation:

See this old answer and links.......

DeltaG^@=DeltaH^@ -TDeltaS^@

And thus it includes an "enthalpy term", and an "entropy term......"

The Gibbs free energy is the single, unequivocal criterion for the spontaneity of chemical change. Negative values of DeltaG denote a "spontaneous reaction". If DeltaG=0, then the reaction is at equilibrium. And if DeltaG>0 then the reaction is non-spontaneous....

DeltaG may also be related to the equilibrium constant, K_"eq" by the equation:

DeltaG^@ =-RTlnK_"eq".

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