|Surface tension. In this demonstration, sulfur floats when sprinkled onto water. When a surfactant (a drop of soap) is added, this reduces the surface tension and the sulfur quickly settles to the bottom of the container.|
|Pressure and Volume Effects on Equilibrium. As an equilibrium gas mixture is compressed and expanded in a syringe, we see QC and Le Chatelier's Principle at work!|
|Reaction of magnesium metal with carbon dioxide. Magnesium burns more intensely when exposed to carbon dioxide, in this case, inside a block of it! Who knew that thermodynamics, free energy and activation energy could be so exciting?|
|The thermite reaction. Rust and aluminum powder react to give molten globs or iron. Everything for the pyromaniac who also wants to know more about thermodynamics, free energy and oxidation-reduction reactions.|
|Fun with liquid nitrogen. Experience the joys of frozen objects at -196 °C. In this clip, an apple and a banana are exposed to liquid nitrogen and then mistreated. We're sure there are some chemical principles to be explained here, but this one is really just fun.|
|In Memory of Terry Todd - I am saddened to report that Terry Todd, the person who helped me set up and film these demonstrations, passed away in January of 2004 from surgical complications. Terry was the U of KY Chemistry Department lecture demonstrator and a great friend and colleague. He will be dearly missed by all who knew him.|
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This document and associated figures are copyright 19990-2023 by Rob Toreki. All rights reserved.