<P> Enthalpy / ˈɛnθəlpi / ( listen ) is a property of a thermodynamic system . The enthalpy of a system is equal to the system 's internal energy plus the product of its pressure and volume . For processes at constant pressure , the heat absorbed or released equals the change in enthalpy . </P>
what type of equation includes the quantity of energy released or absorbed during the reaction
Enthalpy