Fundamentals Of Engineering Thermodynamics
9th Edition
ISBN: 9781119391388
Author: MORAN, Michael J., SHAPIRO, Howard N., Boettner, Daisie D., Bailey, Margaret B.
Publisher: Wiley,
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Chapter 3, Problem 3.82P
To determine
Work transfer and heat transfer.
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A piston-cylinder assembly contains 0.5 lb of air initially at a pressure of 30 lb/in² and a temperature of 300°F. The air is heated at
constant pressure until its volume is doubled. Assume the ideal gas model with constant specific heat ratio, k = 1.4.
Determine the work and heat transfer, in Btu.
Step 1
Determine the work, in Btu.
W12= i
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Btu
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Step 2
The parts of this question must be completed in order. This part will be available when you complete the part above.
Calculate the amount of work necessary for the reversible compression of steam from 1 bar to 10 bar. The compression is to take place in a cylinder fitted with a weightless piston at the constant temperature of 500 oC. Under these conditions we have a superheated vapor.
Report your answer in units of kJ/kg using three decimal places.
As you check your work, note that here we have compression from 1 bar to 10 bar under constant temperature. We would expect the volume of the system to decrease. Use this to check the sign (positive or negative) of your computed work.
Consider a piston-cylinder assembly containing 10.0 kg of water. Initially, the gas has a pressure of 20.0 bar and occupies a volume of 1.0 m3. The system undergoes a reversible process in which it is compressed to 100 bar. The pressure volume relationship during this process is given by: PV1.5 = constant.
(a) What is the initial temperature?
(b) Calculate the work done during this process.
(c) Calculate the heat transferred during this process. (d) What is the final temperature?
Chapter 3 Solutions
Fundamentals Of Engineering Thermodynamics
Ch. 3 - Prob. 3.1ECh. 3 - Prob. 3.2ECh. 3 - Prob. 3.3ECh. 3 - Prob. 3.4ECh. 3 - Prob. 3.6ECh. 3 - Prob. 3.7ECh. 3 - Prob. 3.8ECh. 3 - Prob. 3.9ECh. 3 - Prob. 3.10ECh. 3 - Prob. 3.11E
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