KINETIC+MODEL+OF+AN+IDEAL+GAS

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KINETIC MODEL OF AN IDEAL GAS
Define //pressure//.

PRESSURE: The force exerted per unit area. Measured in pascals. MICROSCOPIC DESCRIPTION OF PRESSURE: Many moving particles exert forces when they collide with container walls give the effect of pressure being exerted by the gas.

State the assumptions of the kinetic model of an ideal gas.

IDEAL GAS: A theoretical gas composed of a randomly moving non-interacting particles. It is a useful idea because many real gases behave like an ideal gas unless temperature or pressure are very high or low.

KINETIC MODEL OF AN IDEAL GAS: A model which treats a gas as many molecules subject to the following assumptions: · The molecules obey Newton’s laws · The intermolecular forces are negligible · The molecules are spherical with negligible volume · The motion of the molecules is random. · The collisions are perfectly elastic. · The time taken for a collision is negligible. State that temperature is a measure of the average random kinetic energy of the molecules of an ideal gas. 

KINETIC ENERGY OF PARTICLES: Temperature is a measure of the average random kinetic energy of the particles. Explain the macroscopic behaviour of an ideal gas in terms of a molecular model. Only qualitative explanations are required. Students should, for example, be able to explain how a change in volume results in a change in the frequency of particle collisions with the container and how this relates to a change in pressure and/or temperature 