Question

Determine the standard enthalpy of formation of calcium carbonate from the thermochemical equations given below.
Ca(OH)2(s) CaO(s) + H2O() DrH = 65.2 kJ/mol-rxn
Ca(OH)2(s) + CO2(g) CaCO3(s) + H2O() DrH = -113.8 kJ/mol-rxn
C(s) + O2(g) CO2(g) DrH = -393.5 kJ/mol-rxn
2 Ca(s) + O2(g) 2 CaO(s) DrH = -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

Answer

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