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Demonstrate Phase Changes of CO2—Demonstration Kit

By: Walter Rohr, Retired, Eastchester High School, Eastchester, NY

Item #: AP4505

Price: $66.95

The Demonstrate Phase Changes of Carbon Dioxide Chemical Equilibrium Demonstration Kit is an ingenious idea to introduce phase diagrams and triple point using dry ice. Using a unique device, all three phases of CO2 can be easily and safely observed.

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This item can only be shipped to schools, museums and science centers

Product Details

An ingenious idea to introduce and demonstrate phase diagrams and triple point using dry ice. At atmospheric pressure carbon dioxide exists only as a solid or gas. However, in a closed system, liquid carbon dioxide will exist when the pressure exceeds 5 atmospheres. The triple point is when all three states of carbon dioxide (solid, liquid and gas) are simultaneously present in a closed system.

Using a unique device called a Triple Point of CO2 Apparatus, all three phases of CO2 can now be easily and safely observed. The apparatus comes with a large pressure gauge to monitor the pressure changes in the apparatus. This is a terrific lab activity.

Concepts: Equilibrium, phase diagrams, triple point, sublimation.
Time Required: 20 minutes
Materials Provided: Triple point of CO2 apparatus, detailed instructions and teaching notes.
Note: Dry ice is required but not provided.

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