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Posted by on Jul 13, 2011 in Physical Chemistry | 0 comments

Heat Flow and Work – Thermodynamic Coupling

The Third Law of Thermodynamics says: if two separated systems are in thermal contact with a third, then at equilibrium they all have the same temperature.

Clearly when we bring two blocks together, heat will flow between them. This is an example of coupling systems A to B and to C so eventually the three will be in equilibrium. This coupling only allows heat to flow through direct contact.

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