Determine the Enthalpy Change for the Decomposition of Calcium Carbonate

question 54

Multiple Choice

Determine the enthalpy change for the decomposition of calcium carbonate CaCO₃(s) → CaO(s) + CO₂(g)
Given the thermochemical equations below.
Ca(OH) ₂(s) → CaO(s) + H₂O( )
Δ_rH° = 65.2 kJ/mol-rxn
Ca(OH) ₂(s) + CO₂(g) → CaCO₃(s) + H₂O( )
Δ_rH° = −113.8 kJ/mol-rxn
C(s) + O₂(g) → CO₂(g)
Δ_rH° = −393.5 kJ/mol-rxn
2 Ca(s) + O₂(g) → 2 CaO(s)
Δ_rH° = −1270.2 kJ/mol-rxn

• A) +48.6 kJ/mol-rxn
• B) +179.0 kJ/mol-rxn
• C) +345.5 kJ/mol-rxn
• D) +441.0 kJ/mol-rxn
• E) +1711.7 kJ/mol-rxn

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