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The standard molar enthalpies of formati...

The standard molar enthalpies of formation of cyclohexane (l) and benzene (l) at `25^(@)C` are `-156` and `+49 kJ mol^(-1)`, respectively. The standard enthaly of hydrogenation of cyclohenxene (l) at `25^(@)C` is `-119 kJ mol^(-1)` Use this data to estimate the magnitude of the resonance enegry of benzene.

A

`252 kJ mol^(-1)`

B

`240 kJ mol^(-1)`

C

`152 kJ mol^(-1)`

D

None of these

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The correct Answer is:
C
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The standard molar enthalpies of formation of cyclohexane (l) and benzene (l) at 25^@C are - 156 and +49 KJ mol^(-1) respectively. The standard enthalpy of hydrogenation of cyclo hexene (l) at 25^@C " is" -116 "KJ mol" ^(-1) . Use these data to estimate the magnitude of the resonance energy of benzene.

The standard molar enthalpies of formation of cyclohexane (I) and benzene(I) at 25^(@)C are -156 and +49 KJ mol^(-1) respectivelyl. The standard enthalpy of hydrogentation of cyclohexene (I) at 25^(@) is -119 KJ mol^(-1) . Use these data to estimate the magnitude of the resonance energy of benzene.

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