==Description and definition==The internal energy of a given state of the system is determined relative to that of a standard state of the system, by adding up the macroscopic transfers of energy that accompany a change of state from the reference state to the given state::formula_1where denotes the difference between the internal energy of the given state and that of the reference state,and the are the various energies transferred to the system in the steps from the reference state to the given state.
V tem primeru je notranja energija edini prispevek k energiji.