Comparing the Specific Heat of Metals I
Comparing the Specific Heat of Metals II
Paramagnetism of Transition Metal Salts
Computer Nacl Crystal Cleavage
Octahedral, Hexagonal, and Tetrahedral Shapes
Thermoluminescent Sodium Chloride
Jars of Sand Representing Electron Flow in a Band
Temperature Dependence on Resistance
Thermal Conductivity of Metals
Glycerine Tube Representing Hole Energies
Counting Photons Using a Solar Cell
Effect of Pressure on the Melting Point of Ice
Fixed Ball and Stick Crystal Models
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.
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: Macromolecules and Solid State Chemistry
Division: General, Physical Chemistry, Material Science Chemistry