A) 400 K
B) 300 K
C) 500 K
D) none of these
Correct Answer: C
Solution :
Key Idea: The reaction is spontaneous when value of \[\Delta G\] is negative. Given \[\Delta S=10\,cal\,mo{{l}^{-1}}{{K}^{-1}}\] \[\Delta H=4\,kcal\,mo{{l}^{-1}}=4000\,cal\,mo{{l}^{-1}}\] Let \[\Delta G=0\] \[\Delta G=\Delta H-T\Delta S\] \[0=4000-T\times 10\] or \[T=\frac{4000}{10}=400\,K\] \[\therefore \]Reaction is spontaneous at temperature above 400 K The only choice having temperature above \[=400K\]is\[(c)\,500K\] \[\therefore \](c) is correct answerYou need to login to perform this action.
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