Essential University Physics: Volume 1 (3rd Edition)

Published by Pearson
ISBN 10: 0321993721
ISBN 13: 978-0-32199-372-4

Chapter 18 - For Thought and Discussion - Page 330: 6



Work Step by Step

The first law of thermodynamics states that energy must be conserved in any process involving system and surroundings, but in irreversible processes, it is hard to define the system and the surroundings. With this being said, note that this is not the same as saying that the first law of thermodynamics is not true in this situation. Energy is always conserved, regardless of the situation.
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