Entropy unit

{{Short description|Unit of energy per mole per temperature}}

The entropy unit is a non-S.I. unit of thermodynamic entropy, usually denoted by "e.u." or "eU" and equal to one calorie per kelvin per mole, or 4.184 joules per kelvin per mole.{{GoldBookRef|file=E02151|title=Entropy unit}} Entropy units are primarily used in chemistry to describe enthalpy changes.