Question

The enthalpy of hydrogenation of cyclohexene is `-119.5kJ mol^(-1)`. If resonance energy of benzene is `-150.4kJ mol^(-1)`, its enthalpy of hydrogenation would be `:`
A. `-358.5KJ mol^(-1)`
B. `-509.9KJ mol^(-1)`
C. `-208.1KJ mol^(-1)`
D. `-269.9KJ mol^(-1)`

Answer 1

Enthalpy of hydrogenation of benzene `=3xx` Entahlpy of hydrogenation of cyclohexane reasonance energy of benzene`=3(-119.5)-(-150.4)=-208.1kg mol`