How to Separate Different Gases from Air?

 

We know that Air is a mixture of different gases like Nitrogen, Oxygen, Carbon Dioxide etc.

They are separated by using Fractional Distillation

 

Steps:

 

 

Air is compressed and cooled to Liquid

This is done by increasing pressure and decreasing temperature

Liquid Carbon Dioxide flows out as dry ice

 

 

Remaining Liquid Air is Warmed up

Heat is applied slowly by using fractional distillation column

Different Gases get separated at different Heights

This is because of Difference in boiling points of different gases

                                Oxygen Argon   Nitrogen

Boiling Point (in celsius) -183   -186       -189

 

Nitrogen and Argon Move to the top

Oxygen remains at the bottom, it is cooled as liquid Oxygen

 

 

  1. Class 9
  2. Chapter 2 Class 9 - Is Matter Around Us Pure

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.