BANTU DONG KAKA :(((((((

Jawaban:

C =C = 612 kj/mol C-H = 413 kj/mol

Br = Br = 193 kj/mol C-C = 346 kj/mol

C – Br = 276 kj/mol

Hitunglah perubahan entalpi pada reaksi

C2H4 (g) + Br2 (g) => CH2Br – CH2Br (g)