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Lecture24 - PHYSICS 220 Lecture 24 Ideal Gas Law and...

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Lecture 24 Purdue University, Physics 220 1 Lecture 24 Ideal Gas Law and Kinetic Theory Textbook Sections 13.5 - 13.8 PHYSICS 220
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Lecture 24 Purdue University, Physics 220 2 Overview Last Lecture – Temperature measure of average Kinetic Energy of molecules – Thermal Expansion Δ L = α L 0 Δ T (linear expansion) Δ V = β L 0 Δ T (volume expansion) – Gas made up of molecules • Today – Ideal Gas – Kinetic Theory of the ideal gas – Diffusion
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Lecture 24 Purdue University, Physics 220 3 Quiz A pendulum is made from an aluminum rod with a mass attached to its free end. If the pendulum is cooled does the pendulum's period A) increase B) decrease C) stay the same
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Lecture 24 Purdue University, Physics 220 4 Charles’s Law If const P: Δ V Δ T V T Inventor of the hydrogen balloon In K In 0 C
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Lecture 24 Purdue University, Physics 220 5 Other Empirical Laws Gay-Lussac’s Law Boyle’s Law Avogadro’s Law If const V: P T If const T: P 1/V If const P and T: V N
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Lecture 24 Purdue University, Physics 220 6 The Ideal Gas Law • P V = N k B T – P = pressure in N/m 2 (or Pascals) – V = volume in m 3 – N = number of molecules
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