Calculate the $\Delta$H f $\degree$rxn for the decomposition of calcium carbonate to calcium oxide and carbon dioxide.
$\Delta$H f $\degree$[CaCO 3 (s)] = -1206.9 kJ/mol; $\Delta$Hf $\degree$[ CaO(s)] = -635.1 kJ/mol; $\Delta$H f B0 [CO 2 (g)] = -393.5 kJ/mol. CaCO 3 (s)$\rightarrow$CaO(s) + CO 2 (g)

Question

Calculate the $\Delta$H f $\degree$rxn for the decomposition of calcium carbonate to calcium oxide and carbon dioxide. 
$\Delta$H f $\degree$[CaCO 3 (s)] = -1206.9 kJ/mol; $\Delta$Hf $\degree$[ CaO(s)] = -635.1 kJ/mol; $\Delta$H f B0 [CO 2 (g)] = -393.5 kJ/mol. CaCO 3 (s)$\rightarrow$CaO(s) + CO 2 (g)

Quizplus · Accepted Answer

The reaction is: CaCO3(s) → CaO(s) + CO2(g). The enthalpy change is calculated as: ΔH°rxn = [ΔHf°(CaO) + ΔHf°(CO2)] - ΔHf°(CaCO3) = [(-635.1) + (-393.5)] - (-1206.9) = 178.3 kJ/mol.

Calculate The Δ\DeltaΔ Hf °\degree° Rxn for the Decomposition of Calcium Carbonate to Calcium Oxide

Calculate The $\Delta$ H_f $\degree$ Rxn for the Decomposition of Calcium Carbonate to Calcium Oxide