Definitions

1. noun

A measure of the total energy of a system, including its internal energy and the energy associated with the pressure and volume of a system.

“The change in enthalpy of a chemical reaction can be calculated using the heat of reaction and the work done by the system.”

2. noun

The sum of the internal energy and the product of the pressure and volume of a system.

“The enthalpy of an ideal gas is a function of its temperature alone.”