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.
When worn on or near the skin, Holofiber responds to available light and the energy produced naturally by the body, converting light and the body's own energy into the necessary wavelengths that make this usually unavailable energy accessible to the body -- thereby improving the body's circulation and oxygen levels.