Gibbs free energy (when charge is passed in a battery)


The Gibbs free energy is a thermodynamic potential that measures the “usefulness” or process-initiating work obtainable from a thermodynamic system, at a constant temperature and pressure (isothermal, isobaric). When multiplied by an amount of charge the emf (electromotive force) yields a thermodynamic work .

Related formulas


GFree energry (J)
SEntropy (J/K)
TAbsolute temperature (K)
pPressure of the system (Pa)
VVolume of the system (m3)
ϵElectromotive force (V)
QCharge (C)