BY ALTERING PRESSURE
Matter is our surrounding of Class 9
BY ALTERING PRESSURE
The difference in various states of matter is due to the different intermolecular spaces between their particles. So when a gas is compressed the intermolecular space between its particles decreases and ultimately it will be converted into liquid.
Pressure and temperature determine the state of a substance. So, high pressure and low temperature can liquify gases.
e.g. Carbon dioxide (CO2) is a gas under normal conditions of temperature and pressure. It can be liquified by compression it to a pressure 70 times more than atmospheric pressure.
Solid CO2 is known as ‘Dry ice’. Solid CO2 is extremely cold and used to ‘deep freeze’ food and to keep ice - cream cold.
