Which of the following statements is incorrect when a system consisting of an ideal gas undergoes a change of state?

  • A
    In a reversible change,$\Delta S_{univ} = 0$
  • B
    In an irreversible change,$\Delta S_{univ} > 0$
  • C
    In an adiabatic process,$\Delta S_{syst} = 0$ is not always true
  • D
    In an isochoric process,$\Delta S_{syst} = nC_v \ln(\frac{T_2}{T_1})$

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