Enthalpy - s243a.wikispaces. Enthalpy, wikipedia. Enthalpy is a defined thermodynamic potential, designated by the letter "H", that consists of the internal energy of the system (U) plus the product of pressure (P) and volume (V) of the system:[1] Since enthalpy, H, consists of internal energy, U, plus the product of pressure (P) and the volume (V) of the system, which are all functions of the state of the thermodynamic system, enthalpy is a state function.
The unit of measurement for enthalpy in the International System of Units (SI) is the joule, but other historical, conventional units are still in use, such as the British thermal unit and the calorie. The enthalpy is the preferred expression of system energy changes in many chemical, biological, and physical measurements, because it simplifies certain descriptions of energy transfer.
Excess Enthalpy. Enthalpy of vaporization. Enthalpy-Pressure diagrams. Throttoling. 1st Law Thermodynamic Open System. Chemical potential. Enthalpy of vaporization. Enthalpy-entropy compensation. Excess Molar Enthalpy. Gibbs Free Energy. Gibbs–Helmholtz equation. Standard enthalpy change of formation.