Question

The bond dissociation energy of methane and ethane are 360 KJ mol-1 and 620 KJ
mol-1 respectively. Then the bond dissociation energy of C-C bond is
a) 170 KJ mol-1
b) 50 KJ mol-1
c) 80 KJ mol-1
d) 220 KJ mol-1​

Answer 1

(c) 80 kj mol-1

it's correct answer