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 Chlorde
Boiling Acetone of Water at Room Temperature
Density of Sulfur Hexafluoride and Sublimation of Certain Gases
Water Cryophorous Tube
Description: A tube contains water and water vapor. When one end of the tube is cooled, the equilibrium shifts to produce more water vapor. This cools the water at the top of the tube, and it quickly freezes. Other versions of this experiment use bromine and cyclohexane.
Source: Alyea, H. N., Dutton, F.B., Baker, P. Tested Demonstrations in Chemistry/ JCE
Year:1950 Vol: 27 Page: 63/617
Keywords: Cryophorous tube, Water, Water vapor, Temperature
Rating: 
Hazard: Medium
- Implosion hazard
- Cryogenic burn hazard
- Mild asphyxiation hazard
Effectiveness: Good
- Strong effects are seen by audience
- High reliability
- Good connection from demo to course material
- Counterintuitive effects
- Time to results is medium
Difficulty: Medium
- Demo at non-standard conditions
- Procedures with some intermediate steps
- Simple manipulations for most to perform
- Demos in which a display is used
Safety Precautions:
- Eye protection required
- Cryogenic gloves required
- Lab coat recommended
- Perform in a well-ventilated area
Class: Gases, Equilibrium of Chemical Systems
Division: General, Physical Chemistry
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