Thermodynamics: An Engineering Approach 8th Edition

Published by McGraw-Hill Education
ISBN 10: 0-07339-817-9
ISBN 13: 978-0-07339-817-4

Chapter 4 - Energy Analysis of Closed Systems - Problems - Page 198: 4-28

Answer

$\Delta u = 1.0\ W/kg$

Work Step by Step

For a closed system without changes in potential or kinetic energies: $Q-W=\Delta U$ If $Q = 1\ W$ and $W = -1.5\ W$ $\Delta U = 2.5\ W$ $\Delta u = \frac{\Delta U}{m} = 1.0\ W/kg$
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