Helmholtz free energy

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English[edit]

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Etymology[edit]

For Hermann von Helmholtz German physicist

Noun[edit]

Helmholtz free energy (uncountable)

  1. (physics, thermodynamics) A measure of the useful work obtainable from a constant temperature, constant volume thermodynamic system; more precisely, the difference between internal energy (of a system) and the product of its absolute temperature and entropy.
     A = U - T S where A is Helmholtz free energy, U is internal energy, T is temperature, and S is entropy.

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