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 1 - Introduction and Basic Concepts - Problems - Page 42: 1-28C

Answer

The system to choose is the volume of gas inside the nozzle. Control volume system.

Work Step by Step

When analyzing the acceleration of gases as they flow through a nozzle the proper choice is to take the system as the volume of gas inside the nozzle and the inlet and outlet of the nozzle as the boundaries. This is a control volume because the mass crosses the boundaries.
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