Answer
There is no change in entropy.
Work Step by Step
The entropy does not change because the system is assumed a steady flow. The net change of heat is zero and the work transfer is frictionless, hence the entropy change is also zero.
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 20 - Entropy and the Second Law of Thermodynamics - Problems - Page 608: 69b
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