Helmholtz free energy

noun

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-TS where A is Helmholtz free energy, U is internal energy, T is temperature, and S is entropy.”

Meanings

noun
  1. natural sciencesA 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-TS where A is Helmholtz free energy, U is internal energy, T is temperature, and S is entropy.

Origin

For Hermann von Helmholtz, German physicist.

Full word history & related roots →

Translations

Chinese Mandarin 亥姆霍茲自由能 /亥姆霍兹自由能
  • 亥姆霍茲自由能 /亥姆霍兹自由能 (Hàimǔhuòzī zìyóu néng)measure of the useful work from a constant temperature system etc.
Finnish Helmholtzin vapaa energia
  • Helmholtzin vapaa energiameasure of the useful work from a constant temperature system etc.
German freie Energie, Helmholtz-Potential
  • freie Energiemeasure of the useful work from a constant temperature system etc.
  • Helmholtz-Potentialmeasure of the useful work from a constant temperature system etc.
  • helmholtzsche freie Energiemeasure of the useful work from a constant temperature system etc.
  • Helmholtz-Energiemeasure of the useful work from a constant temperature system etc.
Russian свобо́дная эне́ргия Гельмго́льца
  • свобо́дная эне́ргия Гельмго́льца (svobódnaja enérgija Gelʹmgólʹca)measure of the useful work from a constant temperature system etc.
Cite this entry
APA

Helmholtz free energy. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/Helmholtz%20free%20energy

MLA

“Helmholtz free energy.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Helmholtz%20free%20energy. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “Helmholtz free energy,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/Helmholtz%20free%20energy.

Source: Helmholtz free energy on Wiktionary, CC BY-SA 4.0.