Question

Using the bond entalpies ∆H:

C---C: 348kJ C=C: 612 kJ C—C (triple bond) : 960 kJ C---H: 412 kJ H---H: 436 kJ

Calculate the calculate the value of ∆H of reaction for

H2C=CH2(g) + H2(g) → CH3—CH3(g)

Answer 1

Delta H reaction = (sum bond energy reactants)-(sum bond energy products)