Bond dissociation energy of CH₄ is 360 kJ/mol and C₂H₆ is 620 kJ/mol. Then bond dissociation energy of C – C bond is

Dissociation energy of methane = 360 kJ mol-1 Bond energy of C – H bond 360 90kJ 4 Bond energy of ethane. 1. B.E. (C – C) + 6 B.E. (C – H) = 620 kJ/mol B.E. (C – C) + 6 × 90 = 620 B.E. (C – C) + 540 = 620 B.E. (C – C) = 620 – 540 B.E. (C – C) = 80 kJ mol-1 Bond dissociation of C – C bond = 80 kJ mol-1 Assertion-Reason Type Questions