After throttling, gas temperature

A Decreases
B Increases
C Remains same
D May increase or decrease ; depends on the nature of the gas

Correct Answer: Decreases

After throttling, the temperature of the gas may increase or decrease because here there are two opposing effects:
1. As the pressure energy is converted to intermolecular energy the temperature of the gas should increase.
2. By throttling since the pressure decreases or expansion will takes place by equation of state we can tell the temperature also decreases.
So, it all depends on what is initial state of the gas and nature of the gas.
Bissoy MCQ
#Chemical Engineering #Chemical Engineering Thermodynamics

Related Questions

The temperature at which a gas, when subjected to Joule-Thomson expansion, neither cools or heats up, is termed as the __________ temperature. Above this temperature the gas heats up on throttling and below this the gas cools down.
A Isotactic
B Saturation
C Inversion
D Throttling
The refrigerant after condensation process is cooled below the saturation temperature before throttling. Such a process is called
A Sub-cooling or under-cooling
B Super-cooling
C Normal cooling
D None of these
The adiabatic throttling process of a perfect gas is one of constant enthalpy
A In which there is a temperature drop
B Which is exemplified by a non-steady flow expansion
C Which can be performed in a pipe with a constriction
D In which there is an increase in temperature
__________ decreases during adiabatic throttling of a perfect gas.
A Entropy
B Temperature
C Enthalpy
D Pressure
All gases above its inversion temperature, in a throttling process will show
A A heating effect
B No change in temperature
C A cooling effect
D Either A or C
All gases during throttling process at atmospheric temperature and pressure show a cooling effect except
A CO2
B H2
C O2
D N2
All gases except __________ shows a cooling effect during throttling process at atmospheric temperature and pressure.
A Oxygen
B Nitrogen
C Air
D Hydrogen
The value of Joule-Thomson co-efficient, in case where cooling occurs after the throttling process is
A 0
B ∞
C +ve
D -ve
The throttling process is __________ process.
A Reversible
B Irreversible
C Reversible or irreversible
D None of these
Joule-Thomson effect i.e., a throttling process is a constant __________ process.
A Entropy
B Temperature
C Internal energy
D Enthalpy

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