Internal energy of system (Given Helmholtz free energy,Gibbs free energy and enthalpy)
Formula
U
the internal energy of the system
A
the Helmholtz free energy
Formula description
Enthalpy is a measure of the total energy of a thermodynamic system. It includes the internal energy, which is the energy required to create a system, and the amount of energy required to make room for it by displacing its environment and establishing its volume and pressure.