Thermal equilibrium | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-12-25

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Thermal_equilibrium


00:00:40 1 Two varieties of thermal equilibrium
00:00:51 1.1 Relation of thermal equilibrium between two thermally connected bodies
00:01:52 1.2 Internal thermal equilibrium of an isolated body
00:03:54 2 Thermal contact
00:04:22 3 Bodies prepared with separately uniform temperatures, then put into purely thermal communication with each other
00:05:43 4 Change of internal state of an isolated system
00:08:13 4.1 In a gravitational field
00:09:23 5 Distinctions between thermal and thermodynamic equilibria
00:11:46 6 Thermal equilibrium of planets
00:12:08 7 See also
00:12:18 8 Citations
00:12:28 9 Citation references



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SUMMARY
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Two physical systems are in thermal equilibrium if there is no net flow of thermal energy between them when they are connected by a path permeable to heat.   Thermal equilibrium obeys the zeroth law of thermodynamics.  A system is said to be in thermal equilibrium with itself if the temperature within the system is spatially and temporally uniform.
Systems in thermodynamic equilibrium are always in thermal equilibrium, but the converse is not always true.  If the connection between the systems allows transfer of energy as heat but does not allow transfer of matter or transfer of energy as work, the two systems may reach thermal equilibrium without reaching thermodynamic equilibrium.