Question

An endothermic reaction A B has an activa-
tion energy 15 kcal/mole and the heat of
reaction is 5 kcal/mole. The activation energy
of the reaction B - A is
1) 20 kcal/mole 2) 15 kcal/mole
3) 10 kcal/mole 4) zero​

Answer 1

Answer:

Activation energy=15kcal/mole

Heat of reaction=5kcal/mole

Total E

a =20kcal/mol

For A→B

For any reaction the activation energy in the forward direction is numerically equal to activation energy of reaction in backward direction.

Therefore E

a for B→A is 20 kcal/mole and option [A] is correct answer.

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