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B Conservation of entropy -- adiabatic process

  1. Apr 28, 2017 #1
    Hello.I have a question about entropy of a thermodynamic system.
    1)If we have let say a gas that is separated by some thermo isolated walls (so no heat goes in or out) does the entropy of that gas conserve? I taught that if S=dQ/dt, because Q=0,then the entropy should be conserved.
    2)So,does the entropy of a system that undergoes an adiabatic process conserve?
     
  2. jcsd
  3. Apr 28, 2017 #2
    No. Entropy is generated in a system experiencing an adiabatic irreversible process and is constant in a system experiencing and adiabatic reversible process. Entropy is not a quantity that,in general, is conserved.
     
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