Calculate the C – C bond energy from the following data:

Assume 416 kJ as the C - H bond energy, Express it in kJ mol-1.
We aim at the equation,
Multiplying equation (ii) by 2 and equation (iii) by 3, we have,
Subtracting (i) from (vi), we have,
Ethane molecule contains one C - C bond and six C - H bonds
Bond dissociation energy of one C - H bond = 416 kJ
Bond dissociation energy of six C - H bonds = 6 x 416 = 2496 kJ