Boyle’s Law and the Mass of a Textbook
Effect of Pressure on the Size of a Balloon
Egg in a Flask – Thermal Decrease in Molar Volume
Flow of Gases Through a Porous Cup
Rate of Diffusion: The Ammonium Chloride Ring
Boltzmann: Digital Simulation of Kinetic Molecular Theory
Boyle’s Law and the Monster Marshmallow
PhET Simulation of Gas Behavior
Effect of Pressure Differences on a Balloon in a Flask
Extinguishing Candles with Carbon Dioxide
A Metal Bar to Demonstrate One Atmosphere
Relation of Gas Pressure and Temperature
Transport of Carbon Dioxide Through a Soap Film
Digital Molecular Theory Simulator
The Greenhouse Effect
Demonstration: A pair of 300-mL Dewar flasks are filled with air(g) and carbon dioxide, CO2(g) respectively, and loosely sealed with a plastic sandwich bag. The flasks are enclosed in a polycarbonate box with an open side. A lamp is set up ~ 30 cm from the top of the Dewar flasks, and a temperature probe is inserted into each. The lamp is energized and the temperature of the two systems are tracked. The flask containing carbon dioxide gas heats more quickly and to a higher temperature than the flask containing air. This demo is available on video. A third gas, HFC-134a also called R-134a can also be employed as a candidate. It is as much as a 10,000 times greater warming effect than carbon dioxide gas.
Source: UW Card Catalog
Year: N/A Vol: N/A Page: N/A
Keywords: Greenhouse Effect, Carbon dioxide, Air, Temperature, Heating, Vibrational Modes
Rating: 
Hazard: Some
- Implosion hazard
- Explosion hazard
- Asphyxiation hazard
- Flammable liquids
- Skin corrosion hazard
- Electric shock hazard
- Burn hazard
- Compressed gas
- Use of hot plate
- Open flame
- Mildly reactive chemicals
- Electricity or inert gas producing reagents
Effectiveness: Average
- Secondary observation
- Time to results is high
- Mild effects are observed by audience
- Moderate failure rate
- Behavior of systems contrast is poor
Difficulty: Medium
- Simple adding of nonreactive reagents
- Simple procedures
- Simple manipulations for most to perform
- Reactions or demos at nonstandard conditions
Safety Precautions:
- Eye protection required
- Gloves recommended
- Use UL approved three-prong plug and outlet
- Handle Dewar flasks with care
- ABC fire extinguisher on hand
Class: Gases, Physical Properties
Division: General Chemistry
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