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Railways NTPC (Technical Ability) Thermodynamics Question Bank Thermodynamics

  • question_answer
    If a system undergoes an irreversible adiabatic process, then (symbols have usual meanings:

    A) \[\int{\frac{dQ}{T}}\,\,=\,\,0\] and \[\Delta \,S>0\]

    B) \[\int{\frac{dQ}{T}\,\,=\,\,0}\] and \[\Delta \,S\,\,=\,\,0\]

    C) \[\int{\frac{dQ}{T}>0}\] and \[\Delta \,S\,\,=\,\,0\]

    D) \[\int{\frac{dQ}{T}<0}\] and \[\Delta \,S<0\]

    Correct Answer: D

    Solution :

    For irreversible process, \[\int{\frac{dQ}{T}<0}\] and \[\Delta S<0\]


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