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Matter is made up of atoms only. A form of heat energy and it is related to the motion of the molecules of matter. The molecules of matter are always moving.Molecules of gaseous matter can move quite freely in a closed space. The process of obtaining the laws of conduct of gaseous matter is known as the kinetics of gas.The key to kinetics is that the molecules of gas move at random speeds due to thermal excitation. As the temperature of the gas increases, the average kinetic energy of the molecules increases.When heat is removed from the gas, the average kinetic energy of the molecules decreases. So the kinetic energy will be zero at absolute zero temperature.This means that the molecules will remain stationary at absolute zero temperature and have no kinetic energy. But before reaching absolute zero temperature, all the gases are converted to liquid or solid state. With various behaviors of gas, such as diffusion, osmosis, self-evaporation, vapor pressure, expansion of gas,