Liquefaction of Gases
Chemistry ⇒ States of Matter
Liquefaction of Gases starts at 9 and continues till grade 12.
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A gas at 300 K is compressed to a pressure of 50 atm, but it does not liquefy. What can you infer about the temperature relative to its critical temperature?
A gas is at a temperature below its critical temperature. What must be done to liquefy it?
Define critical pressure.
Describe the difference between the critical temperature and the boiling point of a substance.
A gas at 300 K is compressed to a pressure of 50 atm, but it does not liquefy. What can you infer about the temperature relative to its critical temperature?
A gas has a critical temperature of 150 K. Can it be liquefied at 200 K by applying pressure?
Calculate the pressure required to liquefy a gas at its critical temperature if its critical pressure is 50 atm.
The critical temperature of CO2 is 31.1°C. Can CO2 be liquefied at 40°C by applying pressure?
The process of liquefying air involves removing which component first? (1) Oxygen (2) Nitrogen (3) Carbon dioxide (4) Argon
Which gas is most difficult to liquefy? (1) Helium (2) Oxygen (3) Nitrogen (4) Carbon dioxide
Which law states that the volume of a given mass of gas is inversely proportional to its pressure at constant temperature? (1) Boyle's Law (2) Charles's Law (3) Avogadro's Law (4) Dalton's Law
Which method is commonly used for the industrial liquefaction of air? (1) Linde's method (2) Joule-Thomson method (3) Claude's method (4) Both 1 and 3
Fill in the blank: The __________ method uses repeated cooling and expansion to liquefy gases.
Fill in the blank: The minimum pressure required to liquefy a gas at its critical temperature is called __________.
Fill in the blank: The temperature at which a gas can be liquefied by applying pressure is always __________ or below its critical temperature.
The process of cooling a gas by allowing it to expand without doing external work is called the __________ effect.
A gas has a critical temperature of 150 K. Can it be liquefied at 200 K by applying pressure?
The critical temperature of CO2 is 31.1°C. Can CO2 be liquefied at 40°C by applying pressure?
True or False: All gases can be liquefied by applying pressure alone, regardless of temperature.
True or False: The critical temperature is the same for all gases.
