Problem: Calculate ΔH forCa (s) + 1/2O2 (g) + CO2 (g) ⟶ CaCO3 (s)given the following reactions:Ca (s) + 1/2O2 (g) ⟶ CaO (s)             Δ H = −635.1 kJCaCO3 (s) ⟶ CaO (s) + CO2 (g)         ΔH = 178.3 kJ

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Ca (s) + ½ O2 (g) CaO (s) 

CaO (s) + CO2 (g) CaCO3 (s)

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Ca (s) + ½ O2 (g) + CO2 (g) CaCO3 (s)


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Problem Details

Calculate ΔH for

Ca (s) + 1/2O2 (g) + CO2 (g) ⟶ CaCO3 (s)

given the following reactions:

Ca (s) + 1/2O2 (g) ⟶ CaO (s)             Δ H = −635.1 kJ

CaCO3 (s) ⟶ CaO (s) + CO2 (g)         ΔH = 178.3 kJ