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Density of CO₂

Last updated

Feb 22, 2023
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- Crystal Structure--- Phase Diagram
- Dependence of Pressure on the Amount of Gas

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Chemical Concepts Demonstrated

Mass and density of gases

Demonstration

Drop pieces of dry ice into the bottle of water, and close the jar.
Dip the open end of the PVC pipe in the soap solution.
Watch as CO₂bubbles form at the end of the pipe.

Observations

The bubbles that form on the end of the tube fall to the ground.

Explanation

It is concievable that students may be under the mistaken impression that gases rise because they have no mass (and, therefore, no density). This demonstration proves that gases do indeed have mass (or, more specifically, differing densities that enable them to rise and sink relative to each other). The carbon dioxide is more dense than the air surrounding it, so bubbles of the gas fall to the ground.

Contributors

Dr. George Bodner (Perdue University)

Chemical Concepts Demonstrated

Demonstration

Observations

Explanation

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