Liquid Nitrogen in Dewars containers, Copper funnel, tongs

Code Number: 4C30.80

Demo Title: Liquid Nitrogen - Making Liquid O2

Condition: Excellent

Principle: Cryogenics

Area of Study: Thermodynamics

Equipment:

Liquid Nitrogen, Copper funnel, Dewars

Procedure:

Pour liquid nitrogen in the small dewar to cool it to the proper temperature. When the boiling ceases, pour all the liquid nitrogen from the dewar into the copper funnel. Place the dewar under the point of the copper funnel to collect the liquid oxygen. You should be able to collect 50 to 100 ml in a 20-minute time frame.

References:

Thomas K. McCarthy, "Two Cryogenic Demonstrations", TPT, Vol. 29, # 9, Dec. 1991, p. 575.

4C30.80

Disclaimer

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Instructional Resources and Lecture Demonstrations

4C30.80 - Liquid Nitrogen - Making Liquid O2

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