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 oreeginal on 2016-08-17. Retrieved 2018-02-19. Unknown parameter |deadurl= ignored (help)
  2. "IUPAC Gold Book. Enthalpy, H." Retrieved 2018-02-19.