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36. Bond Energies, the Boltzmann Factor and Entropy

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Uploaded on Sep 18, 2009

Freshman Organic Chemistry (CHEM 125)

After discussing the classic determination of the heat of atomization of graphite by Chupka and Inghram, the values of bond dissociation energies, and the utility of average bond energies, the lecture focuses on understanding equilibrium and rate processes through statistical mechanics. The Boltzmann factor favors minimal energy in order to provide the largest number of different arrangements of "bits" of energy. The slippery concept of disorder is illustrated using Couette flow. Entropy favors "disordered arrangements" because there are more of them than there are of recognizable ordered arrangements.

00:00 - Chapter 1. Chupka and Inghram's Determination of Graphite's Heat of Atomization
14:19 - Chapter 2. Calculating Equilibrium Constants from Bond Dissociation Energies
27:55 - Chapter 3. The Boltzmann Factor: How is Temperature Related to Energy?
36:24 - Chapter 4. Entropy and the Tendency toward "Disordered Arrangements"

Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses

This course was recorded in Fall 2008.

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