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Kinetic-Molecular Theory's Core Postulates

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Kinetic-molecular theory models a gas as tiny particles in constant, random motion that collide elastically and exert no force between collisions.

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Between collisions, a modeled particle travels a straight line, unaffected by any other particle until it strikes one.

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This model explains why the gas laws hold, not a separate topic — its postulates map onto assumptions Chem 1246 already named.