Engineering Sciences
GATE XE concept:compressibility-factor PYQs
Build your understanding with focused practice from past exam papers.
How to practice concept:compressibility-factor
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–5 of 5. Imported answers require independent review unless marked reviewed.
Question 15
Open questionXE-ENAT2 marksNeeds review
For the Refrigerant R-134 (at 1 MPa and 50°C), the difference between the specific volume computed by assuming it to be an ideal gas and its actual specific volume is:
. If the compressibility factor associated with this state is
, then
__________
m³/kg (3 decimal places).Here
is the specific volume calculated using the compressibility factor.For Refrigerant R-134 (at 1 MPa and 50°C):
The characteristic gas constant: 0.0815 kJ/(kgK), The critical pressure and temperature are, respectively,
MPa and
K.Log in to check the answer
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Open questionXE-ENAT1 markNeeds review
Let
represents the compressibility factor of air at 2 bar and 600 K,
represents the compressibility factor of air at 1 bar and 300 K. If air is assumed to be an ideal gas having gas constant of 0.287 kJ/kg.K, then
is ________.Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 10
Open questionXE-EMCQ2 marksNeeds review
A gas obeys the van der Waals equation of state
, where
and
are van der Waals constants. The compressibility factor
in the limit of high specific volume (
) isYour answerChoose one option.
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Open questionXE-EMCQ1 markNeeds review
The value of the compressibility factor at the critical point evaluated using the van der Waals equation of state is
Your answerChoose one option.
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Open questionXE-EMCQ2 marksNeeds review
Methane has compressibility factor value of 0.9 at reduced pressure of 1.0 and reduced temperature of 1.5. For propane, the critical temperature and pressure are 369.8 K and 42.48 bar, respectively. Take R = 8.314 kJ/kmol.K. Applying the principle of corresponding states, the molar volume of propane (in m
/kmol) at the same reduced pressure and temperature isYour answerChoose one option.
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