Chapter-5-template-2

Chapter-5-template-2 - Kinetic Molecular View of the Three...

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Kinetic Molecular View of the Three States Attractive Forces vs. Kinetic Energy Properties Gas Attractive forces are weak relative to kinetic energy. Particles are far apart. A gas has no fixed shape or volume. Liquid Attractive forces are stronger because particles have less kinetic energy. A liquid can flow and change shape, but has a fixed volume. Solid Attractions dominate motion. Particles are fixed in place relative to each other. A solid has a fixed shape and volume.
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Diffusion and effusion Diffusion: Effusion:
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Effusion. Lighter (black) particles effuse faster than heavier (red) particles
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Graham’s Law of Effusion Graham’s law of effusion states Rate A Rate B = molar mass B molar mass A
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Example problem : How much faster will a sample of Ne effuse than a sample of Cl2?
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Example problem : Ne effuses 1.26 times as fast as an unknow gas. What is the molar mass of the unknown gas?
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Real gases Ideal gas: Real gas: Two assumptions for ideal gases that don’t hold true for real gases:
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Chapter-5-template-2 - Kinetic Molecular View of the Three...

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