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[" (31) The enthalpy of formation of eth...

[" (31) The enthalpy of formation of ethane,ettryene and berzene from the gassous atoms are "-2839.2,],[quad -2275.2" and - "5506kJmot" respectivily.Caculate theressonance anergy of the bondenthalogy "2" ,"],[c-" Hoond is given as equalto "+410.87Kymol" ."]

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The enthalpy of formation of enthane and benzene from the gaseous atoms are -2839.2 and -5506 kJ//mol respectively. Bond enthalpy of C = C bond is Given: Resonance energy of benzene =-23.68" kJ/mol" Bond enthalpy of C-H bond =411.0" kJ/mol"

Calculate the enthalpy of hydrogenation of C_2 H_(4(g)) , given that the enthalpy of formation of ethane and ethylene as -30.2 kcal and +12.5 kcal respectively.

Calculate the enthalpy of formation of ethane from the follwong enthalpy of combustion data: C(s) : - 393.5 kJ, H_(2)(g) : - 285.8 kJ and C_(2)H_(6)(g) : - -1560.0 kJ