When ethyne is passed through a red hot tube, then formation of benzene takes place:
`H_(f(C_(2)H_(2))(g))^(@)=230kJ" "mol^(-1)`
`DeltaH_(f(C_(6)H_(6))(g))^(@)=85kJ" "mol^(-1)`
calculate the standard heat of trimerisation of ethyne to benzene.
`3C_(2)H_(2)(g)toC_(6)H_(6)(g)`

When enthyne is passed through a red hot tube, then formation of benzene takes place: Delta_(f)H_((C_(2)H_(2))(g))^(Theta) = 230 kJ mol^(-1) Delta_(f)H_((C_(6)H_(6))(g))^(Theta) = 85kJ mol^(-1) Calculate the standard heat of trimerisation of ethyne to benzene: 3C_(2)H_(2)(g) rarr C_(6)H_(6)(g)

When enthyne is passed through a red hot tube, then formation of benzene takes place: Delta_(f)H_((C_(2)H_(2))(g))^(Theta) = 230 kJ mol^(-1) Delta_(f)H_((C_(6)H_(6))(g))^(Theta) = 85kJ mol^(-1) Calculate the standard heat of trimerisation of ethyne to benzene: 3C_(2)H_(2)(g) rarr C_(6)H_(6)(g)

If the heats of formation of C_(2)H_(2) and C_(6)H_(6) are 230 kJ mol^(-1) and 85 kJ mol^(-1) respectively, the DeltaH value for the trimerisation of C_(2)H_(2) is

If DeltaH_(f(C_(2)H_(6)))^(0)(g) = -85 KJH mol^(-1) , DeltaH_(f(C_(3)H_(8)))^(0) (g) = -104 KJ mol^(-1), DeltaH^(0) for C (s) rarr C(g) is 718 KJ mol^(-1) and heat of formation of H-atom is 218 KJmol^(-1) then :

If Delta_(f)H^(@) _(C_(3)H_(8)(g))=-85kJ moll^(-1), Delta_(f)H^(@) _(C_(3)H_(8)(g))=-104kJ mol^(-1), DeltaH for C_((s))rarr C_((g)) is 718kJ mol^(-1) and heat of formation of H- atom is 218kJ mol^(-1) , then :

At 25^(@)C and 1 atm, heat of formation of C_(2)H_(4) (g), CO_(2)(g) and H_(2)O(l) are 52 " kJ mol"^(-1), -394 " kJ mol"^(-1) and -286 " kJ mol"^(-1) respectively. Calculate the heat of combustion of C_(2)H_(4)(g) .

The molar enthalpies of combustion of C_(2)H_(2)(g), C("graphite") and H_(2)(g) are -1300,-394 , and -286 kJ mol^(-1) , respectively. The standard enthalpy of formation of C_(2)H_(2)(g) is

The molar enthalpies of combustion of C_(2)H_(2)(g), C("graphite") and H_(2)(g) are -1300,-394 , and -286 kJ mol^(-1) , respectively. The standard enthalpy of formation of C_(2)H_(2)(g) is