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: 18b

Answer

The answer is below.

Work Step by Step

The system is what is being studied, so it makes sense to choose the gas inside of the balloon as the system. The surroundings, since the book wants it to be specific, should be where the energy gained and lost by the system mainly goes. Thus, it makes sense to choose the balloon as the surroundings.
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