Chemistry: Principles and Reactions
8th Edition
ISBN: 9781305079373
Author: William L. Masterton, Cecile N. Hurley
Publisher: Cengage Learning
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Chapter 8, Problem 22QAP
Small amounts of oxygen gas can be prepared in the laboratory by decomposing potassium chlorate with heat. A by-product of the decomposition is potassium chloride. When one mole of potassium chlorate decomposes, 44.7 kJ are evolved.
(a) Write a balanced thermochemical equation for the decomposition of one mole of potassium chlorate.
(b) Is the reaction exothermic?
(c) Draw an energy diagram showing the path of this reaction. (Figure 8.6 is an example of such an energy diagram.)
(d) What is ΔH when 3.00 g of potassium chlorate decompose?
(e) How many grams of potassium chlorate need to be decomposed to liberate fifteen kilojoules of heat?
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Chapter 8 Solutions
Chemistry: Principles and Reactions
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