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Thermodynamics and Chemical Dynamics 131C. Lecture 10. Jim Joule.

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Thermodynamics and Chemical Dynamics (Chem 131C) is part of OpenChem: http://learn.uci.edu/openchemThis video is part of a 27-lecture undergraduate-level course titled "Thermodynamics and Chemical Dynamics" taught at UC Irvine by Professor Reginald M. Penner.Recorded on April 23, 2012.Slide Information04:13 - In an adiabatic process, q=0 for the process...07:51 - note: The change in P with an expansion is larger...08:04 - Isotherm Graph10:21 - ...now it's not obvious from these equations...13:27 - About Jim Joule14:20 - Joule's dad was a brewer18:24 - Now, you should know that Joule was quite an experimentalist.20:09 - Diagram: He actually did this experiment quantitatively21:04 - The quantity of work that must be expended at sea-level...22:35 - 77255 and California DMV22:58 - Diagram: ...so in 1853, he did the following experiment23:44 - So why did Joule expect a temperature change?23:49 - ...this is the Leonard-Jones 6-12 potential.27:29 - For an ideal gas, the intermolecular potential...27:38 - Diagram: At high pressures, you're here.28:17 - Diagram: At "normal" pressures, you're here.28:43 - Well, recall that for a real gas, the compressibility factor...29:09 - The compressibility factor, Z, for a real gas...30:29 - The compressibility factor, Z, for a real gas reflects these two manifolds...31:00 - (Diagram) Now, let's do a thought experiment...32:33 - question: where does the energy come from?34:03 - 1853: Jim Joule tried to measure...35:05 - 1854: Joule teams up with a new friend, William Thompson (AKA Lord Kelvin)36:40 - The Joule-Thompson Effect...39:43 - so, the Joule-Thompson process occurs at constant enthalpy.41:12 - but Joule and Thompson were delighted to find that for real gases...41:52 - Problem: The Joule-Thompson coefficient of air at 300K and 25 atm...45:13 - "Plot from your Chapter 14...temperature as a function of pressure."45:54 - note that real gases have two inversion temperatures at each pressure value:47:13 - The Linde Refrigerator: A mechanical heat pump...For more information and access to courses, lectures, and teaching material, please visit the official UC Irvine OpenCourseWare website at: http://ocw.uci.edu

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