In class notes for October 10, 2007

In class notes for October 10, 2007 - See C Real gases o...

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Please take handout from front desk Chapter 5 OWL due Thursday at 11:59pm Exam #2 o A week from Thursday o In Furman Last lecture o Kinetic Theory = urms 3RTMW = KEavg 32RT o Effusion and diffusion o Proportional to Urms o Demo Today o Gas Calculations o Real gases o Chapter 6 Molecular attractions Effusion and Diffusion o = ( ) ( ) rate Arate B MW B MW A is the enrichment factor o See A Chemical calculations with ideal gases o Airbag 2NaN 3(s) 2Na (s) + 3N 2(g) What volume? We will probably need around 67.2 L What temp?
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We will probobaly need around 300 K What pressure? We will probably need around 2 atm See B o Another example (this uses Dalton’s law of partial pressures)
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Unformatted text preview: See C Real gases o The Ideal gas law fails under the conditions of Low Temperature High pressure o Assumptions of kinetic theory that dont work Molecules have no volume. Collisions are elastic (molecules are not attracted to each other) See D When you get close to liquification, the real gas equation is more appropriate. Know what you are adjusting for in the equations: volume the molecules occupy and the pressure the molecules exhibit when they begin to stick together. o...
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In class notes for October 10, 2007 - See C Real gases o...

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