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JEE Main & Advanced Sample Paper JEE Main Sample Paper-35

  • question_answer
    Which of the following thermodynamic condition at constant pressure and temperature is necessary for the spontaneity of a process?

    A)  \[d(E-TS+PV)>0\]           

    B)  \[d(E-TS+PV)<0\]

    C)  \[d(E-TS+PV)=0\]           

    D)  \[d(E+TS+PV)<0\]

    Correct Answer: B

    Solution :

    Necessary condition for a spontaneity of process
    \[dG<0\]                     \[G=H-TS\]
    \[d(H-TS)<0\]             \[H=E+PV\]
    \[d(E+PV-TS)<0\]


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