liquification of gas
Answers
The liquefaction of a gas takes place when the intermolecular forces of attraction become so high that they bind the gas molecules together to form the liquid state.
The intermolecular forces of attraction can be increased either by increasing the pressure so that the molecules come close together or by cooling the gas so that the kinetic energy of the molecules decreases and they become slower.
The effect of temperature on the liquefaction of gases is found to be very important as higher the temperature of the gas ,more difficult it is to liquefy it and higher is the pressure required.
Gas like hydrogen ,helium, oxygen, nitrogen could not be liquefied at room temperature by application of pressure alone. Each of these gases could also be liquefied provided first it is cooled down to or below a particular temperature. For each gas, there is a particular temperature above which it cannot be liquefied, howsoever, high pressure may be applied on the gas. This temperature is called critical temperature.
Liquification if gas:-)
⟹The process of liquification of a gas takes place at a high pressure and low temperature.
⟹In liquification, a gas can be converted in liquid .
⟹Process of liquification can takes place only at critical temperature or below the critical temperature.
⟹Ex- Critical temperature for CO2 is 30.9°C.
Critical temperature:-
It is the temperature above which a gas cannot be liquefied, even when we apply high pressure.