Written by Jerry Ratzlaff on . Posted in Thermodynamics

enthalpy of system 1Enthalpy, abbreviated as H, measures the sum of internal energy changes in heat under constant pressure of the system.


Enthalpy formula

\(\large{ H =  U + p \; V   }\) 
Symbol English Metric
\(\large{ H }\) = enthalpy of a system \(\large{\frac{Btu}{lbm}}\) \(\large{\frac{kJ}{kg}}\)
\(\large{ U }\) = internal energy of work done in a system \(\large{Btu}\) \(\large{J}\)
\(\large{ p }\) = pressure \(\large{\frac{lbf}{in^2}}\) \(\large{Pa}\)
\(\large{ V }\) = volume of a system \(\large{ft^3}\) \(\large{m^3}\)


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Tags: Energy Equations Enthalpy Equations