Limiting Reactant
Description: In this phenomenon both magnesium metal and hydrochloric acid are limiting reactants. I have used this in a chemistry class, framing it as "The Case of the Mixed Up Masses". I tell them that I added varying amounts of magnesium metal but I forgot to label the flasks. If done correctly they should get the curve seen below. I learned about this on the NSTA Resource page.
Web Resource: NSTA Stoichiometry Balloon Race
The Drinking Bird
Description: The drinking bird is a toy heat engine. The source of energy in this phenomenon is a mystery to most students. It is said that Albert Einstein and his wife Elsa were fascinated with this toy when they visited Shanghai in the 1920's.
Web Resources: The Engineering of the Drinking Bird, The Drinking Bird - Wikipedia
