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 2, Problem 2.23P
To determine
The work for each process, in kJ.
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Please can you solve this question in thermodynamics
A gas contained within a piston-cylinder assembly undergoes three processes in series:
Process 1-2: Constant volume from p₁ = 1 bar, V₁ = 4 m³ to state 2, where p2 = 2 bar.
Process 2-3: Compression to V3 = 2 m³, during which the pressure-volume relationship is pV = constant.
Process 3-4: Constant pressure to state 4, where V4 = 1 m³.
Sketch the processes in series p-V coordinates and evaluate the work for each process, in kJ.
Hint: Draw all the processes neatly on P-V diagram. Denote the states 1-4. Do not forget to add arrows.
Initially contains Air:
P1 = 30 lbf/in^2
T1 = 540 °F
V1 = 4 ft^3
Second phase of process involving Air to a final state:
P2 = 20 lbf/in^2
V2 = 4.5 ft^3
Wheel transfers energy TO the air by WORK at 1 Btu.
Energy transfers TO the air by HEAT at 12 Btu.
Ideal Gas Behavior.
Determine energy transfer by work based on the air to the piston in
Btu.
Wpw
=-1 Btu
Ima
Q = -12 Btu
Air
Wpist
= ?
Initially, p₁ = 30 lbf/in.², T₁ = 540°F, V₁ = 4 ft³.
Finally, p2 = 20 lbf/in.², V₂ = 4.5 ft³.
Chapter 2 Solutions
Fundamentals Of Engineering Thermodynamics
Ch. 2 - Prob. 2.1ECh. 2 - Prob. 2.2ECh. 2 - Prob. 2.3ECh. 2 - Prob. 2.4ECh. 2 - Prob. 2.5ECh. 2 - Prob. 2.6ECh. 2 - Prob. 2.7ECh. 2 - Prob. 2.8ECh. 2 - Prob. 2.9ECh. 2 - Prob. 2.10E
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