Equilibrium Between Nitrogen Dioxide and Dinitrogen Tetroxide
Effect of Pressure on Melting Point of Ice
The Liquid Phase of Carbon Dioxide
Vapor Pressure of Pure Liquids
Getting Colder: Freezing-Point Depression
Getting Hotter: Boiling Point Elevation by Nonvolatile Solutes
Osmotic Pressure of a Sugar Solution
Vapor Pressure of Solutions: Raoult’s Law
Boiling Two Liquids at Room Temperature
Salting Out: Making Liquids Immiscible
Electrolysis of Potassium Iodide
Hydrogen Ion Concentration Cell
Acid-Base Properties of Amino Acids
Electrical Conductivity of Liquids and Solutions
Effect of Pressure on Melting Point of Ice
Description: Two weights connected by piano wire are hung on a bar of ice. The wires cuts through the bar of ice. The ice refreezes, remaining intact when the weights drop to the table top.
Source: UW Card Catalog
Year: N/A Vol: N/A Page: N/A
Keywords: Weights, Piano wire, Ice, Pressure, Melt, Refreeze
Rating: 
Hazard: Low
- Injury hazard – laceration
Effectiveness: Good
- Strong effects are seen by audience
- Demo has good connection to course material
- Clear contrast between behavior of systems
- Time to results is medium
- Moderate failure rate
Difficulty: Medium
- Careful placement is required
- Demos at non-standard conditions
- Prior practice recommended
Safety Precautions:
- Practice is recommended
- Cryogenic gloves are required
- Eye protection is required
Class: Liquids and Solids, Solid State Chemistry, Intermolecular Forces, PV Diagram
Division: General, Material Science Chemistry, Physical Chemistry
Return to Physical Chemistry Demonstrations