A) \[\Delta H=-48\,kJ;\,\,\Delta S=+135\,J/K\]
B) \[\Delta H=-48\,kJ;\,\,\Delta S=-135\,J/K\]
C) \[\Delta H=+48\,kJ;\,\,\Delta S=+135\,J/K\]
D) \[\Delta H=+48\,kJ;\,\,\Delta S=-135\,J/K\]
Correct Answer: C
Solution :
For an endothermic reaction, \[\Delta H=+ve\] and for the spontaneity of a process, \[\Delta G=-ve\]. The correct option must be [c] \[\Delta G=\Delta H-T\Delta S\] = 48000 - 400 \[\times \] 135 = 48000 - 54000 = - 6000 \[Jmo{{l}^{-1}}\] \[\therefore \] Reaction with \[\Delta H=48\] KJ and \[\Delta S=+135\,J/K\] is spontaneous.
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