Balloon Filled with 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 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
Freezing Balloons
Description: The behavior of balloons is compared when they are filled with helium and carbon dioxide and cooled in liquid nitrogen.
Source: Chem13 News #204: May
homepage: https://uwaterloo.ca/chem13-news-magazine/
Year: 1991 Vol: 23 Page: 2
Keywords: Change of state, Sublimation, Condensation, Cryogenics
Rating: 
Hazard: Some
- Cryogenic burn hazard
- Asphyxiation hazard
- Implosion hazard
Effectiveness: Good
- Strong effects seen by audience
- Good connection to course material
- Low failure rate
- Clear contrast between behavior of systems
- Time to results is low
Difficulty: Low
- Simple procedures
- Manipulations are simple for most to perform
Safety Precautions:
- Cryogenic gloves are required
- Eye protection is required
- Perform in a well-ventilated area
- Use of tongs is recommended
- Latex allergen
Class: Phase Changes, Physical Chemistry, Gases, Liquid and Solids
Division: General
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