FUND OF ENG THERMODYN(LLF)+WILEYPLUS
9th Edition
ISBN: 9781119391777
Author: MORAN
Publisher: WILEY
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Chapter 3, Problem 3.27CU
To determine
Ideal gas model’s aspects.
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Air is compressed in a piston-cylinder assembly from p₁ = 25 lb/in², T₁= 500°R, V₁ = 9 ft³ to a final volume of V₂ = 1 ft³ in a process
described by pyl.30 = constant. Assume ideal gas behavior and neglect kinetic and potential energy effects.
Using constant specific heats evaluated at T₁, determine the work and the heat transfer, in Btu.
Step 1
Determine the work, in Btu.
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i) Can water vapor at 442°C and 75 bar be modeled at ideal gas?
Question #2
For the following processes, find the changes in h as appropriate.
The initial state pressure is p1 = 0.5 MPa. the final state is 2.
a. constant volume : v1 = 0.3 m3/kg, p2 = 0.3 MPa;
b. constant entropy : s1 = 6.3 kJ/kg K, p2 = 0.15 MPa;
c. constant volume : h1 = 2500 kJ/kg, p2 = 0.2 MPa;
d. constant enthalpy : s1 = 6.4 kJ/kg K, p2 = 0.2 MPa;
Chapter 3 Solutions
FUND OF ENG THERMODYN(LLF)+WILEYPLUS
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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