CHEM 125A - Freshman Organic Chemistry I
Lecture 20 - Rise of the Atomic Theory (1790-1805). This lecture traces the development of elemental analysis as a technique for the determination of the composition of organic compounds beginning with Lavoisier's early combustion and fermentation experiments, which showed a new, if naive, attitude toward handling experimental data. Dalton's atomic theory was consistent with the empirical laws of definite, equivalent, and multiple proportions. The basis of our current notation and of precise analysis was established by Berzelius, but confusion about atomic weight multiples, which could have been clarified early by the law of Avogadro and Gay-Lussac, would persist for more than half a century. (from oyc.yale.edu)
| Lecture 20 - Rise of the Atomic Theory (1790-1805) |
| Time | Lecture Chapters |
| [00:00:00] | 1. The Development of Elemental Analysis: Lavoisier's Early Combustion and ....Fermentation Experiments |
| [00:12:25] | 2. The Correct Experiment: Early Dealings with Experimental Data |
| [00:28:05] | 3. John Dalton's Proportions and Atomic Theory |
| [00:37:28] | 4. Berzelius's Contributions to Modern Precise Analysis and the Atomic Weight Confusion |
| References |
| Lecture 20 - Rise of the Atomic Theory (1790-1805) Instructor: Professor J. Michael McBride. Resources: Professor McBride's website resource for CHEM 125 (Fall 2008). Transcript [html]. Audio [mp3]. Download Video [mov]. |
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