Reversibility and irreversibility

Reversibility and irreversibility

  • Reversible process is the one which can be retraced in opposite order by changing external conditions slightly.
  • Those processes which can not be retraced in opposite order by reversing the controlling factors are known as irreversible process.
  • It is a consequence of second law that all the natural processes are irreversible process.
  • Conditions for reversibility of a process are
         (i) Process is performed quasi-statically
         (ii) it is not accompanied by any dissipative effects.
  • It is impossible to satisfy these two conditions perfectly, thus Reversible process is purely an ideal abstraction.

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