AP15 Entropy, Free Energy, & Equilibrium
High Entropy Dali
- Phillipe Halsman's wife, Yvonne, holds the chair up.
- The assistants get ready with the water and the cats.
- The assistants throw the cats and the bucket of water and Dali jumps.
- Philippe Halsman takes the photo...28 times.
Entropy increases when matter or cats are dispersed, and will be decreased in 9 weeks during the AP Exams as students gather to take the tests.
Chapter 4 Section 4.04 and Chapter 19 Section 1
Demos
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In the nomenclature section, you found that some transition metals can have more than one charged ion. Vanadium has quite a few possible ionic states. By using reducing agents, it is possible to take the most oxidized state of vanadium and, by adding electrons, reduce the vanadium from a +5 down to a +2 oxidation state.
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RedOx is all about gain and loss of electrons. Cooling ammonia into a liquid and then placing an alkali metal in the liquid allows the electrons from the metal to go into solution. In this experiment, you get to see electrons roaming in solution. (am) stands for ammonia solvent solution just as (aq) stands for aqueous (water solvent) solution. Na(s) → Na+(am) + e-(am)The ammonia solvated electrons make this solution electrically conductive.
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Rob Lederer starts red-ox
Optional:
- Rob had an equation on the top of the whiteboard that he promised to balance later. I didn't inlcude that video because you would not see this type of problem on the AP Chem test.
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AP16.10 C04-C19 Red Ox Rxn's
