exergy

The term "exergy" was coined in 1956 by Zoran Rant (1904–1972) from Ancient Greek ἐξ (ex, “out of, away from”) + ἔργον (érgon, “work”).

English Wikipedia has an article on:

exergy

Wikipedia

exergy (countable and uncountable, plural exergies)

1. (physics) Concentrated or organized energy, which can be exported and do work in the process.
   • 2002, J. Honerkamp, Statistical Physics, page 298:

     The maximum fraction of an energy form which (in a reversible process) can be transformed into work is called exergy. The remaining part is called anergy, and this corresponds to the waste heat.

• free energy

• anergy
• bound energy