Question

How does pressure help in liquefaction of a gases? according to class9?

Answer 1

I am just giving the logic: assume that you have a cubical container with a piston attached at the top. When you compress the air with the help of the piston, the molecules of air get less space to move around ( gaseous molecules are widespread). This also reduces the distance between molecules. Eventually the molecules will be at a distance which resembles to a liquid, meaning the gas has been converted to liquid... ( For imagining purposes, think of a room with many less people, and eventually reducing the size of room)

Answer 2

Answer:

Gases can be liquified by applying pressure and lowering the temperature. ... On applying pressure the gaseous particles come closer and start attracting eachother. When gas is compressed too much then heat is produced due to compression.