JIPMER Jipmer Medical Solved Paper-1997

  • question_answer
    An endothermic reaction is spontaneous if:

    A)  \[\Delta \,H>T\cdot \Delta \,S\]              

    B)  \[\Delta \,H<T\cdot \Delta \,S\]

    C)                         \[\Delta \,H=T\cdot \Delta \,S\]

    D)         \[T\cdot \Delta \,S=0\]

    Correct Answer: B

    Solution :

    For a reaction, to be spontaneous, the value of \[\Delta G\] (i.e., free energy change) must negative. According to Gibbs-Helmholtz equation \[\Delta G=\Delta H-T\cdot \Delta S\] If reaction is endothermic \[(\Delta H=+ve),\]then \[\Delta G\] to be negative, \[T\cdot \Delta S>\Delta H\]


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