Chemistry: The Molecular Science (5th Edition)

Published by Cengage Learning
ISBN 10: 1285199049
ISBN 13: 978-1-28519-904-7

Chapter 4 - Energy and Chemical Reactions - Questions for Review and Thought - Topical Questions - Page 189a: 18a

Answer

The answer is below.

Work Step by Step

Obviously, some energy is being lost as the balloon goes upward to the air. However, the book wants a specific choice of the system and the surroundings. Thus, it makes sense to choose the air inside of the balloon as the system and the balloon itself as the surroundings.
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