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The activation energy of exothermic reac...

The activation energy of exothermic reaction `A rarr B" is 80 kJ mol"^(-1)`. The heat of reaction is `-200" kJ mol"^(-1).` The activation energy for the reaction `B rarr A` `("in kJ mol"^(-1))` will be :

A

280

B

120

C

40

D

200

Text Solution

Verified by Experts

The correct Answer is:
A
` Delta H = (E_ a ) _ f - ( E _ a ) _ b `
` - 200 = 80 - ( E _ a ) _ b `
` ( E_ a ) _ b = 280 KJ//"mole" `
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