Meaning & use

thermal equilibrium

phrase·Academic

A state in which two objects in contact have reached the same temperature and stop exchanging heat.

See it in a sentence

The coffee eventually reaches thermal equilibrium with the room, cooling to the same temperature.

The experiment tracked how long the two metal blocks took to reach thermal equilibrium.

A note on using this word

Thermal equilibrium is a core idea behind the zeroth law of thermodynamics, which defines temperature itself.

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