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A11. Potassium chlorate (KClO3) is often used to generate oxygen according to its decomposition reaction at 25 °C (shown below): 2KClO3(s) ® 2KCl(s) + 3O2(g) DfHϴ (kJ mol-1) Sϴ (J K-1 mol-1) KClO3 (s) -397.8 143.1 KCl (s) -435.9 82.6 O2 (g) 0 205.0 Use the thermochemical data provided in the table above to calculate the standard change in Gibbs Energy (DrGϴ) for this reaction. (A) 88.6 kJ (B) -88.6 kJ (C) -223.4 kJ (D) +223.4 kJ (E) -266.1 kJ