Enthalpy is a property o a thermodynamic seestem. The enthalpy o a seestem is equal tae the seestem's internal energy plus the product o its pressur an vollum.[1][2] For processes at constant pressur, the heat absorbed or released equals the chynge in enthalpy.


  1. "Oxford Living Dictionaries". Archived frae the original on 17 August 2016. Retrieved 19 Februar 2018. Unknown parameter |deadurl= ignored (help)
  2. "IUPAC Gold Book. Enthalpy, H." Retrieved 19 Februar 2018.