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Demonstrating Phase Changes of Carbon Dioxide — CO2 Demonstration Kit

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

Item #: AP4505 

Price: $77.74

In Stock.

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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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 with detailed instructions and teaching notes.

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

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Developing and using models

Disciplinary Core Ideas

MS-PS1.A: Structure and Properties of Matter
MS-PS3.A: Definitions of Energy
HS-PS1.A: Structure and Properties of Matter
HS-PS2.B: Types of Interactions
HS-PS3.A: Definitions of Energy
HS-PS3.B: Conservation of Energy and Energy Transfer

Crosscutting Concepts

Scale, proportion, and quantity
Systems and system models
Energy and matter

Performance Expectations

MS-PS1-4: Develop a model that predicts and describes changes in particle motion, temperature, and state of a pure substance when thermal energy is added or removed.
HS-PS3-2: Develop and use models to illustrate that energy at the macroscopic scale can be accounted for as a combination of energy associated with the motion of particles (objects) and energy associated with the relative position of particles (objects).
HS-PS3-4: Plan and conduct an investigation to provide evidence that the transfer of thermal energy when two components of different temperature are combined within a closed system results in a more uniform energy distribution among the components in the system (second law of thermodynamics).