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Is it reasonable to assume that at the given states the
Chapter 2, Problem 69HP(choose chapter or problem)
Problem 69HP
Is it reasonable to assume that at the given states the substance behaves as an ideal gas?
a. Oxygen at 30°C, 3 MPa
b. Methane at 30°C, 3 MPa
c. Water at 30°C, 3 MPa
d. R-134a at 30°C, 3 MPa
e. R-134a at 30°C, 100 kPa
Questions & Answers
QUESTION:
Problem 69HP
Is it reasonable to assume that at the given states the substance behaves as an ideal gas?
a. Oxygen at 30°C, 3 MPa
b. Methane at 30°C, 3 MPa
c. Water at 30°C, 3 MPa
d. R-134a at 30°C, 3 MPa
e. R-134a at 30°C, 100 kPa
ANSWER:
Solution 69 HP:
Here we have to check whether we can assume the substances at the given states, as ideal gases or not.
a) oxygen at at 3 Mpa.
The critical temperature of oxygen is 154.5 K.
As, and the condition for ideal gas is
, it can be considered as an ideal gas.
b) methane at at 3 Mpa.
The critical temperature of methane is 190.4 K.
As, and the condition for ideal gas is
, it can be considered as an ideal gas.