Chemistry: The Central Science (13th Edition)

by Brown, Theodore E.; LeMay, H. Eugene; Bursten, Bruce E.; Murphy, Catherine; Woodward, Patrick; Stoltzfus, Matthew E.

Published by Prentice Hall

ISBN 10: 0321910419

ISBN 13: 978-0-32191-041-7

Chapter 5 - Thermochemistry - Exercises - Page 204: 5.23c

Answer

The internal energy of a closed system can increase when work is done on the system or when heat is transferred to the system from its surroundings.

Work Step by Step

Since no mass can be exchanged with a closed system, heat and work are the only sources of energy change.

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