A-LevelChemistryChemical energeticsMay/June 2022Paper 4 Q414 Marks
Calcium carbonate decomposes on heating. CaCO3(s) → CaO(s) + CO2(g) Table 4.1 shows the values of the Gibbs free energy change, AG°, for this reaction at various temperatures. [Figure Table 4.1] Assume the standard enthalpy change, ∆Η°, and the standard entropy change, AS, for this reaction remain constant over this temperature range.
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