Physical characteristics of gases - Physical characteristics of gases The Kinetic-Molecular Theory of Matter I Kinetic-molecular theory based on the

Physical characteristics of gases - Physical...

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Physical characteristics of gases The Kinetic-Molecular Theory of Matter I. Kinetic-molecular theory - based on the idea that particles of matter are always in motion A. Explains properties of solids, liquids, and gases in terms of energy of particles and forces that act between them A. Actual Yield - the measured amount of a product obtained from a reaction B. Percent Yield - the ratio of the actual yield to the theoretical yield, multiplied by 100 II. Kinetic molecular theory of Gases A. Ideal gas - an imaginary gas that perfectly fits all the assumptions of the kinetic- molecular theory B. Theory is based on 5 assumptions: 1. Gas particles = large numbers of small particles that are far apart a. most of the volume is empty space
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Unformatted text preview: 2. Collisions between gas particles and other particles (container’s wall, etc.) are elastic collisions a. elastic collision- no net loss of kinetic energy b. kinetic energy is transferred, but the net energy is constant as long as temperature is constant 3. Gas particles are in a continuous, random motion (possess kinetic energy) 4. There are no forces of attraction or repulsion between gas particles 5. The average kinetic energy of gas particles depends on temperature a. kinetic energy = ½ mv^2 b. m = mass; v = velocity c. all gases at the same temperature have the same average kinetic energy d. therefore, lighter gas particles move faster...
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