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A liquid is irregularly stirred in a well-insulated

University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman ISBN: 9780321675460 31

Solution for problem 13DQ Chapter 19

University Physics | 13th Edition

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University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman

University Physics | 13th Edition

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Problem 13DQ

A liquid is irregularly stirred in a well-insulated container and thereby undergoes a rise in temperature. Regard the liquid as the system. Has heat been transferred? How can you tell? Has work been done? How can you tell? Why is it important that the stirring is irregular? What is the sign of ?U? How can you tell?

Step-by-Step Solution:

Solution to 13DQ Step 1 In the question it has been mentioned that the container is well insulated, thus the volume of the container doesn’t change. Thus the process of stirring the container filled with water is an isochoric process and an adiabatic transformation of work. The process is irreversible as well because stirring is a work done on viscous forces, thus it is a non reversible process. (a) No, the heat has not been transferred as the container is a well insulated one therefore heat cannot enter nor it can leave the container, thus dQ=0. (b) Yes, the work has been done on the system. Stirring will put the system out of equilibrium....

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Chapter 19, Problem 13DQ is Solved
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Textbook: University Physics
Edition: 13
Author: Hugh D. Young, Roger A. Freedman
ISBN: 9780321675460

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