Question

the dissociation energy of methane is 400 k cal per mole and ethane is 670 k cal per mole the c-c bond energy is ??​

Answer 1

400= 4(energy of C-H bond)

energy of CH bond = 100

6 CH BOND IN ETHANE + 1 C-C BOND= 670

C-C bond energy= 670-600= 70 kcal/mole