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Why is Carnot not irreversible?

  1. Apr 8, 2013 #1

    I am thinking about the Carnot-Cycle-Process.
    I know that a heat exchange is always irreversible.

    But in the Carnot-Cycle, there is heating too.
    Why is that kind of heating, in the Carnot-Process reversible?

    Thx Abby
  2. jcsd
  3. Apr 8, 2013 #2
    Heat exchange is always irreversible only for the processes which are not infinitesimally slow (or quasi-static or quasi-equilibruum) processes.

    In Carnot-Cycle heating is done infinitesimally slowly, that's why it is reversible.
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