Helmholtz free energy

Helmholtz function

the thermodynamic function of a system that is equal to its internal energy minus the product of its absolute temperature and entropy: A decrease in the function is equal to the maximum amount of work available during a reversible isothermal process.
Also called Helmholtz free energy, work function.

named after H. L. F. von Helmholtz

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World English Dictionary
Helmholtz function (German ˈhɛlmhɔlts)
A, F, Also called: Helmholtz free energy a thermodynamic property of a system equal to the difference between its internal energy and the product of its temperature and its entropy
[C20: named after Baron Hermann Ludwig Ferdinand von Helmholtz (1821--94), German physiologist, physicist, and mathematician]

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