ThermochemistryHard

Question

The enthalpy of hydrogenation of benzene is –51.0 kcal/mol. If enthalpy of hydrogenation of 1, 4-cyclohexadiene and cyclohexene is –58 kcal/mol and –29 kcal/ mol, respectively, then what is the resonance energy of benzene?

Options

A.29 kcal/mole
B.36 kcal/mole
C.58 kcal/mole
D.7 kcal/mole

Solution

$|R.E.| = 29 \times 3 - 51 = 36\text{ kcal/mol}$

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