Question

Tolong dibantu dong
diketahui energi ikatan rata-rata
CI-CI=244 kJ/mol
H-CI=432 kJ/mol
O-H=464 kJ/mol
O=O=498 Kj/mol
perubahan entalpi untuk reaksi 2CI2(g)+2H2O(g) ---) 4HCI(g)+O2(g)

Answer 1

2 Cl-Cl + 2 H-O-H → 4 H-Cl + O=O

ΔH = ∑I reaktan - ∑I produk
     = [2 Cl-Cl + 2 (2 O-H)] - [4 H-Cl + O=O]
     = [(2 × 244) + (4 × 464)] - [(4 × 432) + 498]
     = 118 kJ/mol