Topical Questions
These questions are keyed to major topics in the chapter. Usually a question that is answered at the back of this book is paired with a similar one that is not.
Many metal carbonates can be decomposed to the metal oxide and carbon dioxide by heating.
CaCO3(s) → CaO(s) + CO2(g)
(a) Calculate the enthalpy, entropy, and Gibbs free energy changes for this reaction at 25.00 °C.
(b) Is it product-favored or reactant-favored?
(c) Based on the signs of ΔH° and ΔS°, predict whether the reaction is product-favored at all temperatures.
(d) Predict the lowest temperature at which appreciable quantities of products can be obtained.
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