Calculate the ΔH°_rxn for the decomposition of calcium carbonate to calcium oxide and carbon dioxide. ΔH°_f [CaCO₃(s) ] = −1206.9 kJ/mol; ΔH°_f [CaO(s) ] = −635.1 kJ/mol;
ΔH°_f [CO₂(g) ] = −393.5 kJ/mol
CaCO₃(s) → CaO(s) + CO₂(g)

Question

Quizplus · Accepted Answer

The ΔH°rxn is calculated using the formula ΔH°rxn = ΣΔH°f(products) - ΣΔH°f(reactants). For this reaction, it is (−635.1 kJ/mol + (−393.5 kJ/mol)) - (−1206.9 kJ/mol) = 178.3 kJ.

Calculate the ΔH°rxn for the Decomposition of Calcium Carbonate to Calcium

Calculate the ΔH°_rxn for the Decomposition of Calcium Carbonate to Calcium