Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion
Discussion Forum : Heat Transfer, Refrigeration and Air Conditioning - Section 2 (Q.No. 22)
22.
The critical pressure of a liquid is the pressure
Discussion:
14 comments Page 1 of 2.
Akash kumar said:
8 years ago
The critical temperature of a substance is the temperature at and above which vapor of the substance cannot be liquefied, no matter how much pressure is applied.
The critical pressure of a substance is the pressure required to liquefy a gas at its critical temperature.
The critical pressure of a substance is the pressure required to liquefy a gas at its critical temperature.
Atul Palsara said:
5 years ago
Critical temperature and critical pressure correspond to the critical point in TTT diagram. Above critical point the gas will remain gas and a liquid will remain liquid no matter the increase in temperature or pressure and this state is known as a supercritical fluid.
Danyal Ahmad said:
5 years ago
If the substance is already at the liquid form at a critical pressure, that means that substance is either at critical temperature or below that. In this particular case, on further increase in pressure, we will always have liquid. So, option A is correct.
Swapnil Shelke said:
5 years ago
Here they are asking for liquid.
And for liquid critical values are those above which liquid directly flash off into gaseous phase.
i.e Vapour.
So, I think the answer must be C.
And for liquid critical values are those above which liquid directly flash off into gaseous phase.
i.e Vapour.
So, I think the answer must be C.
(2)
AMAL said:
10 years ago
Critical pressure means the pressure at critical temperature. Critical temperature is temperature above which the gas cannot be liquefied even by increasing the pressure.
Sulekha said:
8 years ago
The critical pressure of a substance is the pressure required to liquefy a gas at its critical temperature.
P s said:
6 years ago
A is the correct answer because compressible liquid above critical points became supercritical fluid.
Uzumaki said:
7 years ago
A is the correct answer since it tells critical pressure of liquid not gas.
Ganesh said:
10 years ago
Critical pressure means pressure at which liquid convert into gas.
Ali said:
4 years ago
I thin both option A & D are correct.
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