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Honors Chemistry Students Learn About the Properties of Dry Ice

Honors Chemistry

Students in Ms. Thomas' Honors Chemistry Class recently explored the properties of dry ice

Lesson: Sublimation

Students have been exploring density, phase changes and properties of matter in chemistry class.  Dry ice (solid carbon dioxide) is an excellent example of sublimation, which is a special phase change where the substance starts as a solid and goes directly to a gas phase (no liquid phase observed).  Special safety precautions must be taken when handling the solid CO2 since the materials is at - 110o F. In addition to being very cold, carbon dioxide is also more dense than normal air.  Students were able to observe demonstrations of its higher density by: seeing how a fog machine works, how it makes a balloon sink, and the general "heaviness" of the gas as it can be poured and travels downward as opposed to rising.

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Corning-Painted Post Area School District | 165 Charles St, Painted Post, NY 14870
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