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 25°C cannot be liquefied by pressure alone. What does this indicate about its critical temperature?
A gas is cooled to below its critical temperature and then compressed. What will happen?
At what temperature (in °C) can nitrogen be liquefied at atmospheric pressure? (Critical temperature of nitrogen = -147°C)
Calculate the pressure required to liquefy a gas at its critical temperature if its critical pressure is 50 atm.
Describe the main steps involved in the Linde process for liquefying air.
Describe the role of cooling in the liquefaction of gases.
Describe the significance of the critical point in the phase diagram of a substance.
Explain why helium is difficult to liquefy.
Explain why increasing pressure alone cannot liquefy a gas above its critical temperature.
Explain why the liquefaction of gases is a physical change.
Explain why the liquefaction of gases is important in the storage and transport of industrial gases.
In the Claude process, what is the main difference compared to the Linde process?
Name two industrial uses of liquefied gases.
State the principle behind the Joule-Thomson effect used in gas liquefaction.
State the two main factors that affect the liquefaction of gases.
What is meant by the liquefaction of gases?
