Extraction of Oxygen and Nitrogen from Liquid Air

Discover the process for extracting gases from the air. A 35-part lesson series continues with a discussion of fractional distillation. The instructor explains how to cool air to a liquid state and then slowly warm the air to collect gases at their respective boiling points.

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Instructional Ideas
  • Pause the video after the instructor poses a question to discuss as a class
  • Have pupils create a list of uses of different atmospheric gases
Classroom Considerations
  • Expects a working knowledge of properties of gases
  • Connects new concepts to previous knowledge
  • Provides a link for additional study on the same topic
  • None