JCECE Engineering JCECE Engineering Solved Paper-2011

  • question_answer
    Which of the following conditions will always lead to a non-spontaneous change?

    A)  \[+ve\Delta H\] and\[+ve\Delta S\]

    B)  \[-ve\Delta H\]and\[-ve\Delta S\]

    C) \[+ve\Delta H\] and\[-ve\Delta S\]

    D) \[-ve\Delta H\]and\[+ve\Delta S\]

    Correct Answer: C

    Solution :

    For a process to be spontaneous, AG will be negative. We know that,                 \[\Delta G=\Delta H-T\Delta S\] If \[\Delta H=+ve\] and\[\Delta S=-ve,\,\,\Delta G\]will be positive at all temperatures. Thus, the process is non-spontaneous.


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