Problem: Determine the enthalpy for this reaction:Ca(OH)2(s) + CO2(g) → CaCO3(s) + H2O(l)Enthalpy of formation for selected substances-CO2(g)                             ΔH   f∘= −393 kJ/molCa(OH)2(s)                      ΔH   f∘= −987 kJ/molH2O(l)                              ΔH   f∘= −286 kJ/molCaCO3(s)                        ΔH   f∘=  −1207 kJ/mol

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FREE Expert Solution

We’re being asked to determine the standard enthalpy change (ΔH˚rxn) for the balanced reaction:

Ca(OH)2(s) + CO2(g)  CaCO3(s) + H2O(l)


Recall that ΔH˚rxn can be calculated from the enthalpy of formation (ΔH˚f) of the reactants and products involved:


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Problem Details

Determine the enthalpy for this reaction:

Ca(OH)2(s) + CO2(g) → CaCO3(s) + H2O(l)

Enthalpy of formation for selected substances-

CO2(g)                             ΔH   f= −393 kJ/mol

Ca(OH)2(s)                      ΔH   f= −987 kJ/mol

H2O(l)                              ΔH   f= −286 kJ/mol

CaCO3(s)                        ΔH   f=  −1207 kJ/mol

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