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Engineering and Tech / Thermodynamics: An Engineering Approach 8 / Chapter 5 / Problem 3P

Thermodynamics: An Engineering Approach | 8th Edition | ISBN: 9780073398174 | Authors: Yunus A. Cengel, Michael A. Boles

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Does the amount of mass entering a control volume have to

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QUESTION: Problem 3P

Does the amount of mass entering a control volume have to be equal to the amount of mass leaving during an unsteady-flow process?

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QUESTION: Problem 3P

Does the amount of mass entering a control volume have to be equal to the amount of mass leaving during an unsteady-flow process?

ANSWER:

Step 1 of 2

In an unsteady flow, the physical properties vary at the inlet and outlet points. The control volume consists of only one inlet and outlet flows.

The shape, size, and structure of a control volume may vary during the unsteady flow process. The energies can be converted into internal energies as the fluid temperature may increase. The mass and the energies may vary at the entry and exit points.

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