Calculate the enthalpy of reaction for Ca(s) + ½O₂(g) + CO₂(g) → CaCO₃(s), given: Ca(s) + ½O₂(g) → CaO(s) ΔH = −635.1 kJ and CaCO₃(s) → CaO(s) + CO₂(g) ΔH = +178.5 kJ.
University of Ilorin CHM101 2026-exam past question
- −813.6 kJ
- −456.6 kJ
- −991.7 kJ
- +813.6 kJ
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