In the context of Bridgman's thermodynamic equations, what does H stand for?

In Bridgman's thermodynamic equations, the symbol H represents enthalpy. Enthalpy is a thermodynamic quantity that is defined as the total heat content of a system. It is expressed in terms of internal energy and the product of pressure and volume (H = U + PV). This concept is particularly useful in processes occurring at constant pressure, as changes in enthalpy can be directly related to the heat transferred in or out of a system. Understanding enthalpy is essential for analyzing heat transfer, chemical reactions, and phase changes in thermodynamic processes.