enthalpy

From Ancient Greek ἐν- (en-, “in”) + θάλπω (thálpō, “to warm”). Coined by Dutch physicist Heike Kamerlingh Onnes, but first used in print by J. P. Dalton in 1909 in a paper titled "Researches on the Joule-Kelvin-effect, especially at low temperatures".

• IPA^(key): /ˈɛn.θəl.piː/

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enthalpy (countable and uncountable, plural enthalpies)

1. (thermodynamics, physical chemistry) A measure of the heat content of a chemical or physical system.

   ${\displaystyle H=U+pV}$, where H is enthalpy, U is internal energy, p is pressure, and V is volume.

• Gibbs free energy