A) < 50 kcal
B) either greater than or less than 50 kcal
C) 50 kcal
D) > 50 kcal
Correct Answer: B
Solution :
[b] \[\Delta H={{E}_{a}}(f)-{{E}_{a}}(b)\] Thus energy of activation for reverse reaction depend upon whether reaction is exothermic or endothermic. If reaction is exothermic, \[\Delta H=-ve,\text{ }{{E}_{a}}\left( b \right)>{{E}_{a}}\left( f \right)\] If reaction is endothermic, \[\Delta H=+ve,\text{ }{{E}_{a}}\left( b \right)<{{E}_{a}}\left( f \right)\]
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