Combustion of Cellulose Nitrate (Guncotton)
Comparing the Specific Heat of Metals II
Endothermic Reaction of Barium Hydroxide and Ammonium Salts
Explosive Decomposition of Nitrogen Triiodide
Explosive Reaction of Hydrogen and Oxygen
Comparing the Specific Heat of Metals I
Decomposition of Ammonium Dichromate
Evaporation as an Endothermic Process
Evaporation of Ether is Endothermic
Explosion of Lycopodium and Other Powders
Reaction of Calcium Oxide and Water
Reaction of Potassium Permanganate and Glycerine
Spontaneous Combustion of White Phosphorus
Reactions of Metals and Hydrochloric Acid
Evaporation as an Endothermic Process
Description: A flask containing acetone is hooked to an aspirator. As the pressure inside the flask is lowered, the acetone boils and its temperature drops.
Source: Shakhashiri, B.Z. Chemical Demonstrations: A Handbook for Teachers of Chemistry
Year: 1989 Vol: 3 Page: 5
Keywords: Evaporation, Endothermic, Acetone, Boiling, Reduced pressure
Rating: 
Hazard: Medium
- Flammability hazard
- Eye irritation hazard
- Central nervous system toxicity hazard
- Implosion hazard
- Electric shock hazard
Effectiveness: Average
- Secondary observations
- Mild effects are seen by audience
- Results are observable with guidance
- Good connection from demo to course material
- Contrast between systems is noticeable
- Moderate failure rate
- Time to results is medium
Difficulty: Medium
- Use of toxic substances
- Demos at non-standard conditions
- Handling of organic chemicals
- Experiments where data, recording, or display are necessary
- Some intermediate steps to results
Safety Precautions:
- Eye protection required
- Gloves required
- Absorbent material on hand
- Perform in a well-ventilated area
- ABC fire extinguisher on hand
- Boiling beads required in flask
- Use of UL approved three-prong plug and outlet
Class: Intermolecular Forces, Thermodynamics
Division: General, Physical Chemistry
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