# enthalpy

## English

### Etymology

From Ancient Greek ἐνθάλπω (enthálpō, to warm in). 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".

### Pronunciation

English Wikipedia has an article on:
Wikipedia
• IPA(key): /ˈɛn.θəl.piː/
•  Audio (US) (file)

### Noun

enthalpy (countable and uncountable, plural enthalpies)

1. () In thermodynamics, 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.