An endothermic reaction, `Ararr B` have an activation energy `15 kcal//mol` and the heat of the reaction is `5 kcal//mol`. The activation energy of the reaction, `Brarr A` is:

Options

A. `20kcal//mol`
B. `15kcal//mol`
C. `10kcal//mol`
D. zero

Answer

C

Explanation

For endothermic reaction, `ArarrB`
Activation energy =`15"kcal"//mol`
Energy of reaction=`5"kcal"//,mol`
Hence, the activation energy for `BrarrA ` is `15-5=10"kcal"//mol.`