unavailable energy


Also found in: Idioms.

unavailable energy

[¦ən·ə¦vāl·ə·bəl ′en·ər·jē]
(thermodynamics)
That part of the energy which, when an irreversible process takes place, is initially in a form completely available for work and is converted to a form completely unavailable for work.
References in periodicals archive ?
Jacob Bekenstein on whether a black hole can radiate, but in the end the two physicists in the 1970s jointly developed the theory of Bekenstein-Hawking entropy -- a measure of the unavailable energy in a closed thermodynamic system which is also usually considered to be a measure of the system's disorder.
With the addition of other stressors such as the emotional reactions to several losses and coping with reactions of family and friends, a great deal of unavailable energy may be required.