Chemistry 9th Edition

Published by Cengage Learning
ISBN 10: 1133611095
ISBN 13: 978-1-13361-109-7

Chapter 6 - Thermochemistry - Exercises: 44

Answer

a. Exothermic b. Exothermic c. Endothermic d. Endothermic

Work Step by Step

a. Because the combustion in a car engine releases heat energy, the process is an exothermic process. b. The condensation of water is the transformation of water from a gas phase to a liquid phase. Therefore, water loses energy in this phase change, an exothermic process. c. The sublimation of a substance requires energy to be absorbed by the system. Therefore, this process is an endothermic process. d. This process involves the breaking of the F-F bond which requires the absorption of energy. Therefore, this process is endothermic.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.