November 2018 1 219 Report
Perhatikan reaksi berikut dengan seksama
2H₂(g) + O₂(g) → 2H₂O(l), ΔH = -571 kJ
2Ca(s) + O₂(g) → 2Ca(s), ΔH = -1269 kJ
CaO(s) + H₂O(l) → Ca(OH)₂(s), ΔH = -64 kJ
Besarnya entalpi pembentukan 3 mol Ca(OH)₂ adalah

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