Repeat problem 3.42 for each gas having a pressure of (a) 2500 kPa, and (b) 25 MPa.
(a) Given: P = 2500 kPa, 0.9 ? Z ? 1.10
(b) Given: P = 25,000 kPa, 0.9 ? Z ? 1.10
What will be an ideal response?
The compressibility chart will be used to find the values of PR at the acceptable limits of
the compressibility chart for each gas.
(a) H2: Tc = 33.3 K, Pc = 1,300 kPa
PR = P/Pc = 1.92
So, for Z = 0.90: TR = 1.6: T = TcTR = 54 K
For Z = 1.10: Not achieved, take T to be infinite
Acceptable Temperature range: 54 K? T
(b) O2: Tc = 154.8 K, Pc = 5,080 kPa
PR = P/Pc = 0.49
So, for Z = 0.90: TR = 1.15: T = TcTR = 178 K
For Z = 1.10: Not achieved, take T to be infinite
Acceptable Temperature range: 178 K ? T
(c) CO2: Tc = 304.2 K, Pc = 7,390 kPa
PR = P/Pc = 0.34
So, for Z = 0.90: TR = 1.05: T = TcTR = 319 K
For Z = 1.10: Not achieved, take T to be infinite
Acceptable Temperature range: 319 K ? T
(b)
Given: P = 25,000 kPa, 0.9 ? Z ? 1.10
The compressibility chart will be used to find the values of PR at the acceptable limits of
the compressibility chart for each gas.
(a) H2: Tc = 33.3 K, Pc = 1,300 kPa
PR = P/Pc = 19.2
So, for Z = 0.90: Not achieved, take T to be infinite
For Z = 1.10: TR = 17: T = TcTR = 566 K
Acceptable Temperature range: 566 K? T
b) O2: Tc = 154.8 K, Pc = 5,080 kPa
PR = P/Pc = 4.92
So, for Z = 0.90: TR = 1.65: T = TcTR = 255 K
For Z = 1.10: Not achieved, take T to be infinite
Acceptable Temperature range: 255 K ? T
(c) CO2: Tc = 304.2 K, Pc = 7,390 kPa
PR = P/Pc = 3.4
So, for Z = 0.90: TR = 1.75: T = TcTR = 532 K
For Z = 1.10: Not achieved, take T to be infinite
Acceptable Temperature range: 532 K ? T
You might also like to view...
Los motores que han sufrido daños serios en el núcleo:
a. reciben un cambio de bobinado. b. se desechan. c. se someten a un reapilamiento de las laminaciones. d. reciben un cambio de núcleo y bobinado.
What is coal? Where did it come from?
What will be an ideal response?
One mole of an ideal gas is placed in a constant volume vessel. The internal energy of the ideal gas is increased by 57 joules, and the temperature increases by 0.9 K. What can you say about CP* for this gas?
A. CP* = 63.3 J/mol•K, and this value is valid at any temperature. B. CP* = 71.6 J/mol•K, and this value is valid at any temperature. C. CP* = 55.0 J/mol•K, and this value is valid at any temperature. D. CP* = 63.3 J/mol•K, but this value is valid only at the particular temperature examined in the experiment. E. CP* = 71.6 J/mol•K, but this value is valid only at the particular temperature examined in the experiment.
Command can request a PAR at any time, but certain benchmarks are also used. A PAR is usually requested except when:
A. The incident is declared under control. B. There is a change in strategy. C. There is an emergency evacuation. D. A firefighter is reporting a progress report.