Answer
Heat because of the temperature difference. Work in all other cases.
Work Step by Step
Is heat when the energy crosses the boundaries of a closed system because of temperature difference, all other forms (as move) are work.
Thermodynamics: An Engineering Approach 8th Edition
by Cengel, Yunus; Boles, Michael
Published by
McGraw-Hill Education
ISBN 10:
0-07339-817-9
ISBN 13:
978-0-07339-817-4
Chapter 2 - Energy, Energy Transfer, and General Energy Analysis - Problems - Page 98: 2-17C
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