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Landus Mumbere Expedito
Gases are made up of small particles called molecules which are held by very weak intermolecular forces of attraction. The molecules are in continuous random motion and continuously collide with thems..

Using kinetic theory of gases to explain absolute zero temperature

 Absolute zero is defined as the temperature at which the molecules have their lowest possible kinetic energy. According to kinetic theory of gases, molecules of a gas have an average speed which increases with temperature. So, as a gas is cooled, its molecules move more and more slowly and hence their kinetic energy decreases more and more. A point is reached when the molecules are assumed to come to rest and their kinetic energy becomes zero. At this point the gas has the lowest possible temperature called absolute zero. 

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