lecture9 - Monday Sept. 22, 2003 Todays Lecture Gases 5.6...

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Monday Sept. 22, 2003 Today’s Lecture Gases • 5.6 Kinetic Theory of Gases
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• Kinetic Molecular Theory of Gases: – simple model used to explain experimental observations about gas behavior – Postulates: • Due to large inter-particle distances, their volume maybe neglected • The collisions of the particles with the walls of the container give rise to pressure • The particles do not exert forces on each other • The average kinetic energy of a gas particle is directly proportional to the temperature (Kelvin)
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– consider a single particle of mass m and moving with a velocity u in a cube with sides L – assume elastic collisions – what is the force of collision with walls? mu is the momentum of the particle u (mu) F m am tt DD = == Ll L x y z
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Summary of Concepts Behind the Kinetic Model Derive an equation for the change in momentum of a particle impinging on one set of parallel walls. Derive an equation for the force a particle impinging on one set of parallel walls.
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lecture9 - Monday Sept. 22, 2003 Todays Lecture Gases 5.6...

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