QUESTION 3 Figure 3 shows the initial state of a system. Container A of 1 m3 contains Air at 300 K and 1500 kPa. It is connected through a valve to a piston-cylinder B with a cross-sectional area of 0.1 m2. When the valve is opened, the piston of cylinder B slowly rises to a height of 2 m. During this process, the air temperature is kept constant at 300 K and it is possible to assume that the entire system (pond + cylinder) expands from a volume VA to a volume (VA + VB). Determine: a) For the initial conditions of pressure and temperature, can the behavior of air be considered as an ideal gas? Foundation. b) What is the change in internal energy in containers A and B during the process? c) The final pressure in cylinder B when the valve is closed.

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
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QUESTION 3
Figure 3 shows the initial state of a system. Container A of 1 m3
contains Air at 300 K and 1500 kPa. It is connected through a
valve to a piston-cylinder B with a cross-sectional area of 0.1 m2.
When the valve is opened, the piston of cylinder B slowly rises to a
height of 2 m. During this process, the air temperature is kept
constant at 300 K and it is possible to assume that the entire system
(pond
+ cylinder) expands from a volume VA to a volume (VA + VB).
Determine:
a) For the initial conditions of pressure and temperature, can the
behavior of air be considered as an ideal gas? Foundation.
b) What is the change in internal energy in containers A and B
during the process?
c) The final pressure in cylinder B when the valve is closed.
d) The final pressure in container A.
e) The work of expansion and the heat exchanged with the
medium.
Gas constant: R = 0.2870 kJ/kgK.
Specific heat at constant volume: cv= 0.718 (kJ/kg K).
Critical properties of air: Te = 132.5 K and Pc 3.77 MPa
Estanque A
Estanque B
Aire
Figure 3: Tank A and cylinder B
system
Transcribed Image Text:QUESTION 3 Figure 3 shows the initial state of a system. Container A of 1 m3 contains Air at 300 K and 1500 kPa. It is connected through a valve to a piston-cylinder B with a cross-sectional area of 0.1 m2. When the valve is opened, the piston of cylinder B slowly rises to a height of 2 m. During this process, the air temperature is kept constant at 300 K and it is possible to assume that the entire system (pond + cylinder) expands from a volume VA to a volume (VA + VB). Determine: a) For the initial conditions of pressure and temperature, can the behavior of air be considered as an ideal gas? Foundation. b) What is the change in internal energy in containers A and B during the process? c) The final pressure in cylinder B when the valve is closed. d) The final pressure in container A. e) The work of expansion and the heat exchanged with the medium. Gas constant: R = 0.2870 kJ/kgK. Specific heat at constant volume: cv= 0.718 (kJ/kg K). Critical properties of air: Te = 132.5 K and Pc 3.77 MPa Estanque A Estanque B Aire Figure 3: Tank A and cylinder B system
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