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Dalton’s Law

Learn about Dalton’s Law of partial pressures, the Kinetic Theory of Gases, and Graham’s Law of effusion. Understand gas behavior, pressure, and effusion rates in this comprehensive guide.

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Dalton’s Law

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  1. Dalton’s Law The total pressure of a gas mixture is the sum of the partial pressure of the components of the mixture.

  2. Formulas • PT =Pa + Pb • PT =P water+ Pgas • PT = nT RT =(na + nb) RT V V • Pa=( na RT)/V

  3. Kinetic Theory of Gases • Gases are mostly empty space. • Gas molecules are in constant, chaotic motion. • Collisions are elastic. • Gas pressure is caused by collisions of molecules with the walls of the the container.

  4. Graham’s Law of Effusion Rate of effusion B/Rate of effusion A = (Molar Mass A/Molar Mass B)1/2

  5. In general, the closer a gas is to the liquid state, the more it will deviate from the ideal gas law. • High pressure • Low temperature

  6. Ch 5 Problems • 42, 44, 50, 54, 56, 62, 64

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