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Instant Fire. Potassium chlorate, KClO 3, is a white, crystalline or powdery solid which is a very good oxidizing agent; it is used in explosives, fireworks, matches, etc. When it decomposes under heating (especially in the presence of a manganese catalyst), it releases molecular oxygen, O 2 : 2KClO 3 (s) â.
DH = -84.9 kJ. The equation tells us that the decomposition of 2 moles of potassium chlorate to form 2 moles of potassium chloride will release 84.9 kJ of heat. However, we are producing 6.14 g rather than 2 moles, so we first convert to moles and then use the conversion â84.9 kJ per 2 moles KCl(s).