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: 3-84

Answer

a) $\upsilon=0.095352\frac{m^3}{kg}$ $(3.7\% error)$ b) $\upsilon=0.09163\frac{m^3}{kg}$ $(0.36\%error)$ c)$\upsilon=0.09196\frac{m^3}{kg}$

Work Step by Step

a) Based on the ideal gas equation: $\upsilon=\frac{RT}{P}=\frac{0.4615\frac{kPam^3}{kgK}*(450+273.15)K}{3500kPa}=0.095352\frac{m^3}{kg}$ $(3.7\% error)$ b) Using the generalized compressibility chart: $P_{R}=\frac{P}{P_{cr}}=\frac{3.5MPa}{22.06MPa}=0.159$ $T_{R}=\frac{T}{T_{cr}}=\frac{723.15K}{647.1K}=1.118$ From Fig A-15 $Z=0.961$ Then $\upsilon=Z\upsilon_{ideal}=0.961*0.995352\frac{m^3}{kg}=0.09163\frac{m^3}{kg}$ $(0.36\%error)$ c)From table A-6: $\upsilon=0.09196\frac{m^3}{kg}$
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