Answer
The energy exchange is work because its the result of force acting through a distance.
Work Step by Step
The sign $\Delta$$E$ is negative because work is being done on the surroundings.
Chemistry: A Molecular Approach (3rd Edition)
by Tro, Nivaldo J.
Published by
Prentice Hall
ISBN 10:
0321809246
ISBN 13:
978-0-32180-924-7
Chapter 6 - Sections 6.1-6.10 - Exercises - Problems by Topic - Page 288: 39b
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