Liquefaction of Gases
Chemistry ⇒ States of Matter
Liquefaction of Gases starts at 9 and continues till grade 12.
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Describe the effect of increasing temperature on the ease of liquefaction of a gas.
Describe the Linde process for the liquefaction of air.
Describe the main difference between the Linde and Claude methods for gas liquefaction.
Describe the significance of the critical point in the phase diagram of a substance.
A gas at 25°C and 1 atm is compressed to 100 atm at the same temperature. Will it necessarily liquefy?
A gas has a critical temperature of 150 K. At what temperature must it be cooled to be liquefied by pressure?
A gas has a critical temperature of 40°C and a critical pressure of 60 atm. Can it be liquefied at 50°C by applying 100 atm pressure?
Calculate the pressure required to liquefy a gas at its critical temperature if its critical pressure is 50 atm.
Which of the following gases can be liquefied at room temperature by applying pressure alone? (1) Ammonia, (2) Nitrogen, (3) Oxygen, (4) Hydrogen
Which of the following gases has the lowest critical temperature? (1) Oxygen, (2) Nitrogen, (3) Hydrogen, (4) Helium
Which of the following gases was the last to be liquefied? (1) Oxygen, (2) Nitrogen, (3) Hydrogen, (4) Helium
Which of the following is a practical application of liquefied gases? (1) Refrigeration, (2) Welding, (3) Rocket propulsion, (4) All of the above
Fill in the blank: The process of cooling a gas by allowing it to expand rapidly is called __________ expansion.
Fill in the blank: The process of liquefying air is used industrially to separate its components by __________ distillation.
Fill in the blank: The process of liquefying gases is important for the industrial production of __________ and other cryogenic liquids.
Fill in the blank: The temperature at which the Joule-Thomson coefficient changes sign is called the __________ temperature.
A gas at 25°C and 1 atm is compressed to 100 atm at the same temperature. Will it necessarily liquefy?
A gas has a critical temperature of 40°C and a critical pressure of 60 atm. Can it be liquefied at 50°C by applying 100 atm pressure?
The critical temperature of ammonia is 132°C. Can ammonia be liquefied at 100°C by applying pressure?
The critical temperature of CO2 is 31.1°C. Can CO2 be liquefied at 40°C by applying high pressure?
