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Zeroth law of thermodynamics in terms of heat

  1. Oct 10, 2011 #1
    Is there any definition of the zeroth law of termodynamics using the heat concept?

    And does the zeroth law imply that the only way 2 systems can transfer energy is if they're not in thermal equilibrium? If 1 system is transferring energy to another one, that means they're not in thermal equilibrium right?
     
  2. jcsd
  3. Oct 10, 2011 #2

    atyy

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    Yes.
     
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