Calculate the heat of combustion of eithene
`CH_(2) = CH_(2)(g) + 3O_(2)(g) rarr 2CO_(2)(g) + 2H_(2)O(I)`
The bond energy data are given below
C = C = 619 kJ `mol^(-1)`
C - H = 414 kJ `mol^(-1)`
O = O = 499 kJ `mol^(-1)`
C = O = 724 kJ `mol^(-1)`
O - H = 460 kJ `mol^(-1)`

Calculate the enthalpy of combustion of ethylene . Given : C_(2) H_(6) (g) + (7)/(2) O_(2) (g) to 2 CO_(2) + 3 H_(2)O (l) , Delta H = = 1562 kJ* mol^(-1) H_(2) (g) + (1)/(2) O_(2) (g) to H_(2) O (l) , Delta H = -286 kJ * mol^(-1) C_(2) H_(4) (g) + H_(2) (g) to C_(2) H_(6) (g) , Delta H = -32 kJ * mol^(-1)

For the reaction, C_(7)H_(8)(I) + 9O_(2)(g) rarr 7 CO_(2)(g) + 4H_(2)O(I) , the calculated heat of reaction is 232 kJ mol^(-1) and observed heat of reaction is 50.4 kJ mol^(-1) , then the resonance energy is

For the reaction, C_(7)H_(8)(I) + 9O_(2)(g) rarr 7 CO_(2)(g) + 4H_(2)O(I) , the calculated heat of reaction is 232 kJ mol^(-1) and observed heat of reaction is 50.4 kJ mol^(-1) , then the resonance energy is

Calculate DeltaH for the reaction H_(2)(g)+1//2O_(2)(g)toH_(2)O(g) given the bond energies of H-H and O=O bonds and O-H bond are 433 kJ mol^(-1) , 492 kJ mol^(-1) and 464kJ" "mol^(-1) .

Changes in enthalpy for the reaction : 2H_(2)O_(2)(g) rarr 2H_(2)O (l) + O_(2)(g) if heat of formation of H_(2)O_(2)(l) and H_(2)O(l) are -188 kJ mol^(-1) and -286 kJ mol^(-1) respectively is