The standard molar enthalpies of formation of cyclohexane(l) and benze – InterviewSolution

1.	The standard molar enthalpies of formation of cyclohexane(l) and benzene(l) at 25oC are −156 and +49 kJ mol−1 respectively. The standard enthalpy of hydogenation of cyclohexene(l) at 25oC is −119 kJ mol−1. Use these data to estimate the magnitude of resonance energy of benzene in kJ/mol.
Answer» The standard molar enthalpies of formation of cyclohexane $(l)$ and benzene $(l)$ at $25^{o} C$ are $- 156$ and $+ 49$ $k J m o l^{- 1}$ respectively. The standard enthalpy of hydogenation of cyclohexene $(l)$ at $25^{o} C$ is $- 119 k J m o l^{- 1}$ . Use these data to estimate the magnitude of resonance energy of benzene in $k J / m o l$ .

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