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Representative Gases Properties of Gases i1 State the five assumptions of the Kinetic-Molecular Theory of gasesi a Gases consist of large numbers of tiny particles These particles usually molecules or atoms typically occupy a volume about 1000 times larger than occupied by the same number of particles in the liquid or solid state Thus molecules of gases are much further apart than those of liquids or solids Most of the volume occupied by a gas is empty space This accounts for the lower density of gases compared to liquids and solids and the fact that gases are easily compressible b The particles of a gas are in constant motion moving rapidly in straight lines in all directions and thus passes kinetic energy The kinetic energy of particles overcomes the attractive forces between them except near the temperature at which the gas condenses and becomes a liquid Gas particles travel in random directions at high speeds c The collisions between particles of a gas and between particles and container walls are elastic collisions An elastic collision is one in which there is no net loss of kinetic energy Kinetic energy is transferred between two particles during collisions but the total kinetic energy of the two particles remains the same at constant temperature and volume d There are no forces of attraction or repulsion between the particles of a gas You can think of ideal gas molecules as behaving like small billiard balls They move very fast and when they collide they do not stick together but immediately bounce apart e The average kinetic energy of the particles of a gas is directly proportional to the Kelvin temperature of the gas The kinetic energy of a particle or any other moving object is given by the equation KE 12mv2 Where m is the mass of the particle and v is the velocity i2 List the five properties of
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