Differential Calculus> Enthalpy of hydrogenation of cyclohexane ...

Enthalpy of hydrogenation of cyclohexane is -119kj/mol. And that of benzene is -208kj/mol. Resonance energy of benzene
Options are. -119kj/mol
-238kj/ mole

-149kj /mol
-565kj /mol

Sameeksha , 7 Years ago

Grade 11

1 Answers

Arun

Last Activity: 7 Years ago

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*x kJ = 208.

Hence

3x = -358.4

x = - 119.46 KJ/mol

Regards

Arun (askIITians forum expert)

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Differential Calculus> Enthalpy of hydrogenation of cyclohexane ...

Enthalpy of hydrogenation of cyclohexane is -119kj/mol. And that of benzene is -208kj/mol. Resonance energy of benzene Options are. -119kj/mol-238kj/ mole -149kj /mol -565kj /mol

Sameeksha , 7 Years ago

Arun

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