begin mathsize 48px style capital delta G to the power of o space equals space minus space R T ln left parenthesis K subscript e q end subscript right parenthesis space end style

ΔGo= Standard Free Energy Change ; R = Universal Gas Constant;  Keq = Equilibrium Constant; T= Temperature





Standard free energy change is easily calculable from the equilibrium constant. Standard free energy change must not be confused with the Gibbs free energy change. The ΔG (Gibbs free energy change) of a system at equilibrium is 0.

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