begin mathsize 48px style capital delta H space equals capital delta U space plus space P capital delta V space end style

ΔH= Enthalpy Change ; ΔU = (Ufinal - Uinitial) Internal Energy Change;  ΔV = (Vfinal - Vinitial)Volume Change;

ΔH

Uini

Ufin

P

Vini

Vfin

 
This calculator relates the enthalpy change of a system at constant pressure with initial and final volume and internal energy at constant pressure. This equation originates from the definition of enthalpy. Change of enthalpy is also related to the heat capacity at constant pressure and the change of temperature. Visit http://calistry.org/calculate/enthalpyChangeConstantPressure for an alternate enthalpy calculator.

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