Unit 6B - Pressure and Gas Laws - AP Chemistry

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8 Terms

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ideal gas

a gas that behaves according to KMT (i.e. sufficiently far from the boundaries of the gas region of the phase diagram)

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ideal gas conditions

  • elastic collisions

  • temperature

  • constant motion of particles

  • size/spacing is insignificant

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non-ideal gas conditions

  • inelastic collisions

  • temperature (phase changes)

  • small volume (size/spacing becomes significant)

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real gas

a gas that is deviating from KMT in some way (usually at low temperatures and/or high pressures, which would cause it to be close to its condensation or deposition point)

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van der waals forces

intermolecular forces

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van der waals equation

(P + n2a/V2)(V-nb) = nRT

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constant ā€œaā€ - pressure correction term

related to the attractions between the particles and must be determined experimentally

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constant ā€œbā€ - volume correction term

related to the volume excluded by a mole of particles and must be determined experimentally