In thermodynamics, thermal equilibrium is a state of a body in which no net heat exchange is taking place within it or between it and its surroundings. [1] A state of equilibrium of heat flow between bodies is the central criterion of the zeroth law of thermodynamics.

See also
Equilibrium state

References
1. Daintith, John (editor). (2005). Oxford Dictionary of Physics, 5th ed. New York: Oxford University Press.

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