Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Chapter 27.2, Problem 3dTH
To determine
The total work done.
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A 4.0-kg piece of aluminum at 29.4 °C is placed in 1.0 kg of water in a Styrofoam container
at room temperature (20.0 °C).
Part A
Estimate the net change in entropy of the system.
Express your answer to two significant figures and include the appropriate units.
AS =
μA
Value
Units
?
Three moles of an ideal gas undergo a reversible
isothermal compression at temperature 19.0 °C.
During this compression, an amount of work
totalling 1500 J is done on the gas.
Part A
You
may
want to review (Page) .
What is the change of entropy of the gas?
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may want to view a Video Tutor Solution of Entropy
change in a free expansion.
?
AS =
J/K
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Constants
Part A
A real heat engine working between heat reservoirs
at 940 K and 570 K produces 680 J of work per
cycle for a heat input of 2700 J.
Compare the efficiency of this real engine to that of an ideal (Camot) engine
Express your answer using two significant figures.
Η ΑΣΦ
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?
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Part B
Calculate the total entropy change of the universe per cycle of the real engine.
Express your answer to two significant figures and include the appropriate units.
?
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Part C
Calculate the total entropy change of the universe per cycle if the engine is ideal (Carnot).
Express your answer to two significant figures and include the appropriate units.
μÅ
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4
Chapter 27 Solutions
Tutorials in Introductory Physics
Ch. 27.1 - Prob. 1aTHCh. 27.1 - In this process, which of the quantities P, V, n,...Ch. 27.1 - Consider the following incorrect student...Ch. 27.1 - Explain why it is not possible to use the ideal...Ch. 27.1 - A long pin is used to hold the piston in place as...Ch. 27.1 - A long pin is used to hold the piston in place as...Ch. 27.1 - Prob. 2cTHCh. 27.2 - Prob. 1aTHCh. 27.2 - Prob. 1bTHCh. 27.2 - Prob. 1cTH
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