Enthalpy (H) : It is defined as the total energy of a system consisting of internal energy (U) and pressure – volume (P × V) type of energy, i.e. enthalpy represents the sum of internal energy U and product PV energy. It is denoted by H and is represented as
Explanation :
- Enthalpy represents total heat content of the system.
- Enthalpy is a thermodynamic state function.
- Enthalpy is an extensive property.
- The absorption of heat by a system increases its enthalpy. Hence enthalpy is called heat content of the system.