Explosive Decomposition of Nitrogen Triiodide
Volume Increase Upon Neutralization
Dissolution of a Binary Mixture
Shapes of Soap Films and Bubbles
Surface Spreading and Surface Tension
Surface Tension of Water: The Floating Paper Clip
Will a Tissue Hold Water? Interfacial Tension
Surface Tension: Floating Duck
Effect of Heating a Rubber Band and a Spring
Surface Tension With Oil and Pepper
Household Chemical Density Column
Evaporation as an Endothermic Process
Effect of Heating a Rubber Band and a Spring
Description: A stretched rubber band shrinks while a stretched metal spring elongates further when warmed with a heat gun.
Source: UW Card Catalog Professor Hyuk Yu UW-Madison
Year: N/A Vol: N/A Page: N/A
Keywords: Entropy, Rubber band, Spring, Heat
Rating: 
Hazard: Low
- Electric shock hazard
- Burn hazard
Effectiveness: Average
- Moderate failure rate
- Results are observable with guidance
- Mild effects are seen by audience
- Experiment addresses preconceived notion
- Time to results is medium
Difficulty: Medium
- Some timed manipulations
- Reactions or demos at non-standard conditions
- Requires attention to detail
Safety Precautions:
- Eye protection required
- Thermal gloves recommended
- Use of UL approved three-prong and outlet
Class: Entropy, Thermodynamics
Division: General, Physical Chemistry
Return to Physical Chemistry Demonstrations