Determine the Standard Enthalpy of Formation of Calcium Carbonate from the Thermochemical

question 8

Multiple Choice

Determine the standard enthalpy of formation of calcium carbonate from the thermochemical equations given 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) −1712.3 kJ/mol-rxn
• B) −441.8 kJ/mol-rxn
• C) −849.6 kJ/mol-rxn
• D) −980.6 kJ/mol-rxn
• E) −1207.6 kJ/mol-rxn

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