# Internal Energy

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