Gases_part2 - The Kinetic-Molecular Theory The basic...

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The Kinetic-Molecular Theory The basic assumptions of the Kinetic-Molecular theory are: 1. Gases consist of discrete molecules that are relatively quite far apart. The volume occupied by the gas molecules is quite small compared to the total volume occupied by the gas at ordinary temperatures and pressures. 2. Gaseous molecules are in continuous, rapid, random, straight- line motion with varying velocities. 3. Collisions between gaseous molecules and of gaseous molecules with the walls of the container are elastic, i.e., there is no net transfer of energy. 4. Between collisions, the molecules exert no attractive or repulsive forces on one another. Instead, each molecule travels in a straight line with constant velocity. The Meaning of Temperature The Kelvin temperature is a measure of the average kinetic energy of the gas particles: (KE) av = (3/2)RT Root Mean Square Velocity It is the square root of the mean square velocity, u rms = (3RT/M) 1/2 1
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Diffusion and Effusion of Gases Effusion: escape of a gas through a small hole into a vacuum. Diffusion: the gradual dispersion of one gas through another.
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This note was uploaded on 12/04/2010 for the course BIO 311 C taught by Professor Mcclelland during the Spring '09 term at University of Texas at Austin.

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Gases_part2 - The Kinetic-Molecular Theory The basic...

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