Gibbs free energy

Type of thermodynamic potential

In thermodynamics, the Gibbs free energy is a thermodynamic potential that can be used to calculate the maximum amount of work, other than pressure-volume work, that may be performed by a thermodynamically closed system at constant temperature and pressure. It also provides a necessary condition for processes such as chemical reactions that may occur under these conditions. The Gibbs free energy is expressed asWhere: is the internal energy of the system is the enthalpy of the system is the entropy of the system is the temperature of the system is the volume of the system is the pressure of the system.

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