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Calculate the resonance energy of C(6)H(...

Calculate the resonance energy of `C_(6)H_(6)` using Kerkule formula for `C_(6)H_(6)` from the following data.
`(i)` `DeltaH_(f)^(@) fo r C_(6)H_(6)=-358.5kJ mol^(-1)`
`(ii)` Heat of atomisation of `C=716.8kJ mol^(-1)`
`(iii)` Bond energy of `C-H,C-C,C=C` and `H-H` are `490,340,620,436.9kJ mol^(-1)` respectively.

Text Solution

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The correct Answer is:
`-150.0kJ mol^(-1);`
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Calculate the resonance energy of C_(6)H_(6) using kekule formula of C_(6)H_(6) from the following data. a. Delta_(f)H^(Theta) for C_(6)H_(6) =- 358.5 kJ mol^(-1) b. Heat of atomisation of C =716.8 kJ mol^(-1) c. Bond enegry of C-H, C-C, C=C and H-H are 490, 620, 436.9 kJ "mole"^(-1) respectively.

Calculate the resonance enegry of isoprene (C_(5)H_(8)) from the data given. Standard Heats of combustion of isoprene, carbon and hydrogen are -3186, -393.5 , and -285.83 kJ mol^(-1) , respectively. Bond energies of C=C, C-C, C-H and H-H bonds are 615, 348, 413 and 435.8 kJ mol^(-1) respectively. Standard heat of sulbilmation of graphite is 718.3 kJ mol^(-1) .

Calculate the resonance enegry of toulene (use Kekule structure form the following data C_(7)H_(8)(l) +9O_(2)(g) rarr 7CO_(2)(g) +4H_(2)O(l)+ DeltaH, DeltaH^(Theta) =- 3910 kJ mol^(-1) C_(7)H_(8)(l) rarr C_(7)H_(8)(g), DeltaH^(Theta) = 38.1 kJ mol^(-1) Delta_(f)H^(Theta) (water) =- 285.8 kJ mol^(-1) Delta_(f)H^(Theta) [CO_(2)(g)] =- 393.5 kJ mol^(-1) Heat of atomisaiton of H_(2)(g) = 436.0 kJ mol^(-1) Heat of sulimation of C(g) = 715.0 kJ mol^(-1) Bond energies of C-H, C-C , and C=C are 413.0, 345.6 , and 610.0 kJ mol^(-1) .

Mole fraction of I_(2) in C_(6) H_(6) is 0.2. Calculate molality of I_(2) in C_(6) H_(6) . (Mw of C_(6) H_(6) = 78 g mol^(-1))

Calculate the DeltaH_(f)^@ of C_(6)H_(12)O_(6) (s) from the following data: DeltaH_(comb)[C_(6)H_(12)O_(6)(s)]=-2816.kJ//mol DeltaH_(f)^(@) of CO_(2)(g)=-393.5kJ//mol DeltaH_(f)^(@) of H_(2)O(l)=-285.9kJ//mol

Calculate DeltaH_(f)^(@) of C_(6)(s) from the following data:, DeltaH_(comb) of C_(6)H_(12)O_(6)(s)=-2816kJ" "mol^(-1),DeltaH_(f)^(@) of CO_(2)(g)=-393.5kJ" "mol^(-1) and DeltaH_(f(H_(2)O))^(@)=-285.9kJ" "mol^(-1) .

Calculate the enthalpy of hydrogenation : C_(2)H_(5)(g) + H_(2)(g) to C_(2)H_(6)(g) Given that the bond enthalpies of H - H , C = C, C- C and C - H bonds are 433, 615, 347 and 413 kJ mol^(-1) respectively.

Calculate the resonance energy of gaseous benzene form the following data. BE(C-H) = 416.3 kJ mol^(-1) BE(C-C) = 331.4 kJ mol^(-1) BE(C=C) = 591.1 kJ mol^(-1) Delta_("sub")H^(Theta)(C,"graphite") = 718.4 kJ mol^(-1) Delta_("diss")H^(Theta)(H_(2),g) = 435.9 kJ mol^(-1) Delta_(f)H^(Theta) ("benzene", g) = 82.9 kJ mol^(-1)

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