ASHRAE Terminology

A Comprehensive Glossary of Terms for the Built Environment
ashrae.org/ashraeterms

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enthalpy

(also known as heat content), thermodynamic quantity equal to the sum of the internal energy of a system plus the product of the pressure volume work done on the system. H = E + pv, where H = enthalpy or total heat content, E = internal energy of the system, p = pressure, and v = volume. (Compare to specific enthalpy.)