internal energy

noun

, Thermodynamics.

1. a function of thermodynamic variables, as temperature, that represents the internal state of a system that is due to the energies of the molecular constituents of the system. The change in internal energy during a process is equal to the net heat entering the system minus the net work done by the system. : U

internal energy

noun

1. the thermodynamic property of a system that changes by an amount equal to the work done on the system when it suffers an adiabatic change. It is the sum of the kinetic and potential energies of its constituent atoms, molecules, etc UE

Word History and Origins

Origin of internal energy¹

First recorded in 1885–90

Example Sentences

Electrons differ in their opinions as to whether man will succeed in drawing upon this internal energy of the atom.

From Project Gutenberg

Vigor, which may be defined as internal energy, must not be confused with size.

From Project Gutenberg

Is it the light, or in the stores of internal energy possessed by the molecule?

From Project Gutenberg

For these cliffs have risenso the geologists tell usthrough their own internal energy to their present proud position.

From Project Gutenberg

There was a thought that a mere circumstance or necessity could determine the exercise of an internal energy.

From Project Gutenberg