Balloon Full of Carbon Dioxide
Effect of Pressure on Melting Point of Ice
The Liquid Phase of Carbon Dioxide
Vapor Pressure of Pure Liquids
Boiling Acetone at Reduced Pressure
Magic Sand Models the Hydrophobic Effect
Surface Tension: Floating Duck
Surface Tension of Water: The Floating Paper Clip
Will Tissue Hold Water? Interfacial Tension
Computer NaCl Crystal Cleavage
Variation of Volume of Water With Temperature
Surface Spreading and Surface Tension
Gel Formation with Sodium Alginate and Calcium Chloride
Boiling Acetone or Water at Room Temperature
Density of Sulfur Hexafluoride and Sublimation of Certain Gases
Superconductor
Description: A magnet is levitated on a superconductor of 1-2-3 yttrium barium copper oxide, when the superconducting material is cooled with liquid nitrogen.
This demonstration is also available on video and JCE Software “Chemistry Comes Alive!” Vol. 2 CD-Rom.
https://mediaspace.wisc.edu/media/Superconductivity+redo.mp4/1_9w7ux86u/76580061
Source: Journal of Chemical Education Vol. 64
Year: 1987 Vol: 64 Page: 851
Keywords: Meissner effect, Superconductivity, Yttrium oxide, Barium carbonate, Magnetism
Rating: 
Hazard: Some
- Cryogenic burn hazard
- Asphyxiation hazard
- Electric shock hazard
- Implosion hazard
Effectiveness: Good
- Strong effects seen by audience
- Low failure rate
- Results are clearly observable without guidance
- Time to results is low
Difficulty: Medium
- Demos at non-standard conditions
- Fine motor skills manipulations
- Simple procedures
- Demos in which a display is used
- Strong magnetic field in use
Safety Precautions:
- Eye protection required
- Perform in well-ventilated area
- Cryogenic gloves required
- Use of UL approved three-prong plug and outlet
- Avoid ferromagnetic material when using magnet
Class: Material Science, Macromolecules and Solid State Chemistry
Division: General, Physical Chemistry
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