Lecture 36 - Bond Energies, the Boltzmann Factor and Entropy

author: J. Michael McBride, Department of Chemistry, Yale University
recorded by: Yale University
published: June 10, 2010,   recorded: December 2008,   views: 2713
released under terms of: Creative Commons Attribution No Derivatives (CC-BY-ND)
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Description

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.

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Reading assignments, problem sets, PowerPoint presentations, and other resources for this lecture can be accessed from Professor McBride's on-campus course website, which was developed for his Fall 2008 students. Please see Resources section below.

Resources:

Professor McBride's web resources for CHEM 125 (Fall 2008)

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