Gibbs free energy (when charge is passed in a battery)
Description
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 formulasVariables
G | Free energry (J) |
S | Entropy (J/K) |
T | Absolute temperature (K) |
p | Pressure of the system (Pa) |
V | Volume of the system (m3) |
ϵ | Electromotive force (V) |
Q | Charge (C) |