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 Non-Volatile 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
The Drinking Bird
Description: This demo illustrates that the evaporation of water is endothermic.
This demonstration is also available on JCE Software “Chemistry Comes Alive!” Vol. 2 CD-Rom.
Source: Shakhashiri, B.Z. Chemical Demonstrations: A Handbook for Teachers of Chemistry
Year: 1989 Vol: 3 Page: 249
Keywords: Happy bird, Dichloromethane, Ethanol, Evaporation, Endothermic
Rating: 
Hazard: Some
- Sharps hazard
- Acute toxicity hazard
- Mild flammability hazard
- Eye irritation hazard
Effectiveness: Average
- Results are observable with guidance
- Mild effects are seen by audience
- Noticeable contrast between systems
- Good reliability
- Time to results is medium
Difficulty: Low
- Manipulations are simple for most to perform
- Some intermediate steps to results
- Simple procedures
Safety Precautions:
- Eye protection required
- Gloves recommended
- Absorbent materials on hand
- Handle glass object with care
Class: Intermolecular Forces, Liquids and Solids, Equilibrium
Division: General, Physical Chemistry
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