Engineering Sciences
GATE XE Properties of Pure Substances PYQs
Build your understanding with focused practice from past exam papers.
Questions 11–20 of 44. Imported answers require independent review unless marked reviewed.
Question 94
Open questionXE-ENAT1 markNeeds review
An insulated rigid closed tank of 2 m
internal volume contains saturated liquid-vapor mixture of water at 200 °C. The quality of the mixture is 0.75. The mass of the mixture in the tank is __________ kg (rounded off to one decimal place). Use the following data for water: At 200 °C:
m
/kg,
m
/kg,
m
/kgLog in to check the answer
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Open questionXE-ENAT1 markNeeds review
A rigid closed tank contains 2 kg of an ideal gas at 500 kPa and 350 K. A valve is opened, and half of the mass of the gas is allowed to escape. Then the valve is closed. If the final pressure in the tank is 300 kPa, the final temperature in the tank is __________ K (in integer).
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Air at 400 K and 200 kPa is heated at constant pressure to 600 K. Assuming that the internal energy is a function of temperature only, the magnitude of change in internal energy during this process is __________ kJ/kmol (rounded off to one decimal place). Use the following data: Molar specific heat of air at constant volume
(kJ/kmol-K)
where T is temperature in K,
kJ/kmol-K,
kJ/kmol-K
and
kJ/kmol-K
.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 97
Open questionXE-EMCQ2 marksNeeds review
A rigid closed tank having a volume of 2 m
contains 0.1 m
of saturated liquid water and 1.9 m
of saturated water vapor at 100 kPa. Heat is transferred to the tank until the final tank pressure reaches 2 MPa. Following data for water is given: At 100 kPa:
m
/kg,
m
/kg,
kJ/kg,
kJ/kg; At 2 MPa:
m
/kg,
m
/kg,
kJ/kg,
kJ/kg. The magnitude of heat transfer in this process isYour answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 101
Open questionXE-ENAT2 marksNeeds review
A piston-cylinder device initially contains 1 m
of air at 200 kPa and 25 °C. Air expands at constant pressure while a heater of 250 W is switched on for 10 minutes. There is a heat loss of 4 kJ during this process. Assuming air as an ideal gas, the final temperature of air is ______ °C (rounded off to one decimal place).Use the following data for air:
kJ/kg-K,
kJ/kg-KLog 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 103
Open questionXE-ENAT2 marksNeeds review
A rigid tank of 2 m
internal volume contains 5 kg of water as a saturated liquid-vapor mixture at 400 kPa. Half of the mass of the saturated liquid in the tank is drained-off while maintaining constant pressure of 400 kPa in the tank. The final quality of the mixture remaining in the tank is ______ (rounded off to two decimal places).Use the following data for water:
At 400 kPa:
m
/kg,
m
/kg,
m
/kgLog in to check the answer
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Open questionXE-ENAT1 markNeeds review
A 1.2 m
rigid vessel contains 8 kg of saturated liquid-vapor mixture at 150 kPa. The specific enthalpy of this mixture is ______ kJ/kg (round off to 2 decimal places).At 150 kPa:
m
/kg,
m
/kg,
kJ/kg,
kJ/kgLog in to check the answer
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Open questionXE-EMCQ2 marksNeeds review
On the basis of the ideal gas equation and van der Waals equation, the temperatures of a gas at pressure 10 MPa and specific volume 0.005 m³/kg would be, respectively
(Assume gas constant
kJ/(kg K),
m⁶ kPa/kg² and
m³/kg)Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 107
Open questionXE-ENAT2 marksNeeds review
An insulated rigid container is divided into two parts by a thin partition. One part of the container contains 6 kg of saturated liquid-vapor mixture with a dryness fraction of 0.7 at 0.3 MPa. The other part contains 12 kg of saturated liquid at 0.6 MPa of the same substance. When the partition is removed and the system attains equilibrium, the final specific volume of the mixture is ______ m³/kg (round off to 2 decimal places).
Use the following property values:
At 0.3 MPa:
m³/kg,
m³/kgAt 0.6 MPa:
m³/kg,
m³/kgLog 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 2
Open questionXE-EMCQ1 markNeeds review
The liquid phase of a pure substance is termed as ____________, if its temperature is lower than the saturation temperature corresponding to its pressure
.Your answerChoose one option.
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