Question

Explain the following method of separation with an example each:

Preferential liquefaction

Answer 1

Preferential liquefaction:

• Preferential liquefication is used for the separation of gases on basis of liquefication.
• Liquefication is the method of converting gas into liquid by applying some pressure.
• The gas liquefaction will take below or at its critical temperature.
• The critical temperature is the temperature above which a gas can not liquefy whatever pressure may apply.
• After liquefying a gas it can be separated using fractional distillation
• For example, As the critical temperature of ${\mathrm{CO}}_2$​ is high compared to the critical temperature of ${\mathrm{O}}_2$. ${\mathrm{CO}}_2$ is liquefied first. Higher the critical temperature, the higher the ability to liquefy.