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Unformatted text preview: 1 STIPULATIONS 1. Gas is made of vast number of molecules that are in constant random motion. 2. Particles are infinitely small they occupy no volume. 3.Particles move in straight lines except when colliding with each other or walls of the container; collisions are elastic and kinetic energy is conserved. KINETIC MOLECULAR THEORY KINETIC MOLECULAR THEORY STIPULATIONS 4. Particles interact only when collisions occur. 5. The average kinetic energy of the particles in a gas is proportional to the absolute temperature of the gas and does not depend on the identity of the gas. MAXWELL-BOLTZMANN DISTRIBUTION AVERAGE KINETIC ENERGY DISTRIBUTION FUNCTION KINETIC MOLECULAR THEORY So far, all the descriptions have been applicable to purely hypothetical ideal gases: 1. Gas molecules occupy no volume. number of moles gas vs. volume of the container mean free path average distance a particle travels between collisions with other particles. IDEAL VS. REAL mean free path 70 nm in air at room temperature and atmospheric pressure distance about 200 times the size of a small molecule like N 2 or O 2 volume is (200 3 ) almost a million times (8 x 10 6 ) the size of the particle....
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