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25) D.
26) Dik : ΔHf CO = 110 kJ/mol
ΔHf COCl2 = 223 kJ/mol
Dit : CO + Cl2 ==> COCl2 ΔH ?
Jawab :
ΔH = [ΔHf Produk] - [ΔHf Reaktan]
ΔH = 223 - 110
ΔH = 113 kJ/mol (C)