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For A+B rarr C+D, DeltaH=-20 kJ mol^(-1)...

For `A+B rarr C+D, DeltaH=-20 kJ mol^(-1)`, the activation energy of the forward reaction is `85 kJ mol^(-1)`. The activation energy for backward reaction is …… `kJ mol^(-1)`.

A

`65`

B

`105`

C

`85`

D

`40`

Text Solution

Verified by Experts

The correct Answer is:
b
For a reaction `E_(a)` for forward reaction `=E_(a)` for backward reaction `+DeltaH`
`:. 85=A-20`
or `A=105 kJ mol^(-1)`
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