# Internal Energy

Written by Jerry Ratzlaff on . Posted in Thermodynamics

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

### Internal Energy FORMULA

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

Where:

$$\large{ U }$$ = internal energy

$$\large{ T_a }$$ = absolute temperature

$$\large{ R }$$ = ideal gas constant

$$\large{ n }$$ = moles

Tags: Equations for Energy