Internal Energy

Written by Jerry Ratzlaff on . Posted in Thermodynamics

energy internalInternal energy, abbreviated as U, is the total of all energies associated with the motion of the molecules in the system.


Internal energy formula

\(\large{ U =  \frac {3}{2} \; n \; R \; T_a }\) 


 Units English Metric
\(\large{ U }\) = internal energy \(\large{Btu}\) \(\large{J}\)
\(\large{ T_a }\) = absolute temperature \(\large{ R }\) \(\large{ K }\)
\(\large{ R }\) = ideal gas constant \(\large{ \frac{lbf-ft}{lbmol-R} }\) \(\large{ \frac{J}{kmol-K} }\)
\(\large{ n }\) = number of moles \(\large{dimensionless}\)


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Tags: Equations for Energy