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Grade: 12th pass
        The enthalpy of hydrogenation of cyclohexene is -119.5 kJ mol-1. Ilf resonance energy of benzene is -150.4 kJ mol-1, its enthalpy of hydrogenation would be
2 years ago

Answers : (1)

Vikas TU
9484 Points
							
Cyclohexene after hydrogenation would be converted to purely saturated cyclohexane.
As cyclohexene has one pi bond its enthalpy of hydrogenation is -119.5 kJ mol-1.
In benzene there are 3 pi bonds hence the enthalpy of hydrogenation = -150.4 kJ –  3 * -119.5 kJ.
=> 208 kJ
 
 
2 years ago
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