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

Question 49

Multiple Choice

Determine the standard enthalpy of formation of calcium carbonate from the thermochemical equations given below. Ca(OH) 2(s) → CaO(s) + H2O( Determine the standard enthalpy of formation of calcium carbonate from the thermochemical equations given below. Ca(OH) <sub>2</sub>(s) → CaO(s) + H<sub>2</sub>O(   )  Δ<sub>r</sub>H° = 65.2 kJ/mol-rxn Ca(OH) <sub>2</sub>(s) + CO<sub>2</sub>(g) → CaCO<sub>3</sub>(s) + H<sub>2</sub>O(   )  Δ<sub>r</sub>H° = −113.8 kJ/mol-rxn C(s) + O<sub>2</sub>(g) → CO<sub>2</sub>(g)  Δ<sub>r</sub>H° = −393.5 kJ/mol-rxn 2 Ca(s) + O<sub>2</sub>(g) → 2 CaO(s)  Δ<sub>r</sub>H° = −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 )
ΔrH° = 65.2 kJ/mol-rxn
Ca(OH) 2(s) + CO2(g) → CaCO3(s) + H2O( Determine the standard enthalpy of formation of calcium carbonate from the thermochemical equations given below. Ca(OH) <sub>2</sub>(s) → CaO(s) + H<sub>2</sub>O(   )  Δ<sub>r</sub>H° = 65.2 kJ/mol-rxn Ca(OH) <sub>2</sub>(s) + CO<sub>2</sub>(g) → CaCO<sub>3</sub>(s) + H<sub>2</sub>O(   )  Δ<sub>r</sub>H° = −113.8 kJ/mol-rxn C(s) + O<sub>2</sub>(g) → CO<sub>2</sub>(g)  Δ<sub>r</sub>H° = −393.5 kJ/mol-rxn 2 Ca(s) + O<sub>2</sub>(g) → 2 CaO(s)  Δ<sub>r</sub>H° = −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 )
ΔrH° = −113.8 kJ/mol-rxn
C(s) + O2(g) → CO2(g)
ΔrH° = −393.5 kJ/mol-rxn
2 Ca(s) + O2(g) → 2 CaO(s)
ΔrH° = −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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