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 3 - Properties of Pure Substances - Problems - Page 157: 3-87

Answer

$\Delta \upsilon=0.0172\frac{m^3}{kg}$

Work Step by Step

$P_{R}=\frac{P}{P_{cr}}=\frac{5MPa}{5.12MPa}=0.977$ $T_{R,1}=\frac{T_{1}}{T_{cr}}=\frac{293K}{282.4K}=1.038$ $T_{R,2}=\frac{T_{2}}{T_{cr}}=\frac{473K}{282.4K}=1.675$ From Fig. A-15: $Z_{1}=0.560$ $Z_{2}=0.961$ The specificic volume change is: $\Delta \upsilon=\frac{R*(Z_{2}T_{2}-Z_{1}T_{1})}{P}=\frac{0.2964\frac{kPam^3}{kgK}*(0.961*473K-0.56*293K) }{5000kPa}=0.0172\frac{m^3}{kg}$
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