Matter can change state because of Increase or Decrease in Pressure

Increase in Pressure

When pressure is applied on gas

It converts into liquid


If we put some gas in a test tube and compress it with help of test tube it compresses (converts into liquid)


Decrease in Pressure

Due to decrease in pressure, solid can turn into gas


Solid Carbon dioxide (also called dry ice) gets converted into gas at room temperature,

This is due to the decrease of pressure to 1 atm (atmosphere)

What is 1 atmosphere?

The pressure of air in the atmosphere is called atmospheric pressure
The atmospheric pressure of air at sea level is taken to be 1 atmosphere
1 atmosphere= 1.01 × 10 5 pascal

Effect of change in pressure in matter - Teachoo.png

  1. Class 9
  2. Chapter 1 Class 9 - Matter In Our Surroundings

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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.