Enthalpy of a system is the sum of the internal Energy and the product of pressure and volume.

Enthalpy represents the total energy stored in the system.

H = U + pV

where

H is the enthalpy

U is the internal energy

p is the pressure and

V is the volume

*Enthalpy and Temperature*

The change in enthalpy is directly proportional to the change in temperature.

dH = m C

_{p}(T

_{2}-T

_{1}) Where C

_{p}is the specific heat at constant pressure