Chemistry 10th Edition

Published by Brooks/Cole Publishing Co.
ISBN 10: 1133610668
ISBN 13: 978-1-13361-066-3

Chapter 1 - The Foundations of Chemistry - Exercises - Matter and Energy: 9

Answer

a. exothermic b. exothermic c. endothermic d. exothermic e. exothermic f. exothermic

Work Step by Step

a. Burning gasoline is combustion which releases heat and is therefore an exothermic process b. freezing ice cream means that the surroundings absorb heat from the liquid ice cream. Thus the ice cream is giving off heat and is exothermic. c. chocolate has to absorb heat to melt, therefore the process is endothermic d. for water to cool it has to release heat into its surroundings, therefore the process is exothermic e. condensing water means water is going from a higher energy gas to a lower energy liquid. Thus it has to give off heat to condense, so the process is exothermic f. Burning a match is another combustion reaction, giving off heat it is exothermic.
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