Question

Calculate the enthalpy of the reaction H₂C = CH₂ (g) +H₂ (g) →CH₃ - CH₃ (g) The bond energies of C - H.C -C.C = C and H -H are 99,83,147 and 104 kcal respectively

Answer 1

The reaction is:

∆H = ?

∆H= Sum of bond energies of reactants – Sum of bond energies of products