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 17 - Compressible Flow - Problems - Page 889: 17-13C

Answer

See explanation below.

Work Step by Step

Sound travels faster in helium. Since c = $\sqrt {KRT}$ and helium has the highest KR value. It is about 0.40 for air, 0.35 for argon, and 3.46 for helium.
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