Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
enthalpy is a noun meaning "(thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure". It carries one recorded sense.
(thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure
“enthalpy is the amount of energy in a system capable of doing mechanical work”
thermodynamics
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for enthalpy come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.