Fundamentals of Physics Extended
10th Edition
ISBN: 9781118230725
Author: David Halliday, Robert Resnick, Jearl Walker
Publisher: Wiley, John & Sons, Incorporated
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Chapter 20, Problem 32P
GO A Carnot engine is set up to produce a certain work W per cycle. In each cycle, energy in the form of heat QH is transferred to the working substance of the engine from the higher-temperature thermal reservoir, which is at an adjustable temperature TH. The lower-temperature thermal reservoir is maintained at temperature TL = 250 K. Figure 20-28 gives QH for a range of TH. The scale of the vertical axis is set by QHs = 6.0 kJ. If TH is set at 550 K, what is QH?
Figure 20-28 Problem 32.
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53. ssm A Carnot engine has an efficiency of 0.700, and the temperature
of its cold reservoir is 378 K. (a) Determine the temperature of its hot res-
ervoir. (b) If 5230 J of heat is rejected to the cold reservoir, what amount
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32 A Carnot engine is set up to produce a certain work W
per cycle. In each cycle, energy in the form of heat QH is
transferred to the working substance of the engine from
the higher-temperature thermal reservoir, which is at an adjustable
temperature T. The lower-temperature thermal reservoir is main-
tained at temperature T = 250 K. Figure 20-28 gives QH for a
range of TH. The scale of the vertical axis is set by QH. = 6.0 kJ. If
TH is set at 550 K, what is Qu?
%3D
QH-
250
300
350
Figure 20-28 Problem 32.
TH (K)
Qu (kJ)
A piston–cylinder device contains air that undergoes a reversible thermodynamic cycle. Initially, air is at 400 kPa and 300 K with a volume of 0.3 m3 air is first expanded isothermally to 150 kPa, then compressed adiabatically to the initial pressure, and finally compressed at the constant pressure to the initial state. Accounting for the variation of specific heats with temperature, determine the work and heat transfer for each process.
Chapter 20 Solutions
Fundamentals of Physics Extended
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