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For an endothermic reaction energy of ac...

For an endothermic reaction energy of activation is `E_(a)` and enthlpy of reaction is `Delta H` (both in `kJ "mol"^(-1)`). Minimum value of `E_(a)` will be

A

Less than `DeltaH`

B

Equal to `Delta H`

C

More than `Delta H`

D

equal to zero

Text Solution

Verified by Experts

The correct Answer is:
C
key idea in endothermic reations energy of reactants is less than that of the products .
potential enregy diagram for endothermic reactions is

where,
`E_(a)` = activation energy of forward reaction
`E_(a) =` activation energy of backward reaction
`Delta H` = enthalpy of the reaction .
from the above diagram.
`E_(a)=E'_(a)+DeltaH`
`thus , E_(a) gt Delta H`
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