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What do you mean by the standard enthalp...

What do you mean by the standard enthalpy of atomisation of chlorine at `25^(@)C=+121kJ*mol^(-1)`?

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The standard molar enthalpies of formation of cyclohexane (l) and benzene (l) at 25^(@)C "are" -156 and +49kJ mol^(-1) respectively. The standard enthalpy of hydrogenation of cyclohexene (l) at 25^(@)C is -119kJ mol^(-1) . Use these data to estimate the magnitude of the resonance energy of benzene.

The standard molar enthalpies of formation of cyclohexane (l) and benzene (l) at 25^(@)C are -156 and +49 kJ mol^(-1) , respectively. The standard enthaly of hydrogenation of cyclohenxene (l) at 25^(@)C is -119 kJ mol^(-1) Use this data to estimate the magnitude of the resonance enegry of benzene.

The standard molar enthalpies of formation of cyclohexane (l) and benzene (l) at 25^(@)C are -156 and +49 kJ mol^(-1) , respectively. The standard enthaly of hydrogenation of cyclohenxene (l) at 25^(@)C is -119 kJ mol^(-1) Use this data to estimate the magnitude of the resonance enegry of benzene.

The standard molar enthalpies of formation of cyclohexane (I) and benzene(I) at 25^(@)C are -156 and +49 KJ mol^(-1) respectivelyl. The standard enthalpy of hydrogentation of cyclohexene (I) at 25^(@) is -119 KJ mol^(-1) . Use these data to estimate the magnitude of the resonance energy of benzene.

The standard molar enthalpies of formation of cyclohexane (I) and benzene(I) at 25^(@)C are -156 and +49 KJ mol^(-1) respectivelyl. The standard enthalpy of hydrogentation of cyclohexene (I) at 25^(@) is -119 KJ mol^(-1) . Use these data to estimate the magnitude of the resonance energy of benzene.

The standard molar enthalpies of formation of cyclohexane (I) and benzene(I) at 25^(@)C are -156 and +49 KJ mol^(-1) respectivelyl. The standard enthalpy of hydrogentation of cyclohexene (I) at 25^(@) is -119 KJ mol^(-1) . Use these data to estimate the magnitude of the resonance energy of benzene.