Question

The standard molar enthalpies of formation of cyclohexane ()() and benzene ()() at 25oc25oc are 37 and +11.5 kcal/mol37 and +11.5 kcal/mol respectively. The standard enthalpy of hydrogenation of cyclohexane ()() at 25oc25oc is 28.5 kcal/mol28.5 kcal/mol. From the given data, calculate the magnitude of resonance energy of benzene :

Answer 1

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Answer 2

· The standard molar enthalpies of formation of cyclohexane(l)and benzene(l) at 25°C are- 156 and+ 49 kJ mol-1