Diketahui energi ikatan: C - C = 348 kJ/mol, C = C = 614

Diketahui energi ikatan: C - C = 348 kJ/mol, C = C = 614 kJ/mol, H - Br = 366 kJ/mol, C - H = 413 kJ/mol, dan C - Br = 276 kJ/mol. Tentukan delta H reaksi C4H5 + HBr -> C4H9Br!