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Tom Kuntzleman's picture

Chemical Mystery #4: The Case of the Misbehaving Balloon

Tue, 02/03/2015 - 11:19 -- Tom Kuntzleman

Conducting experiments with liquid nitrogen experiments is a sure-fire way to energize many chemistry lessons. Unfortunately, getting access to liquid nitrogen can be a bit difficult. I happen to purchase liquid nitrogen from Airgas; you might be able to find a branch near you here.

Tom Kuntzleman's picture

Nail Bottle Demonstration in Slow Motion

Fri, 02/21/2014 - 11:27 -- Tom Kuntzleman

The nail bottle demonstration is one that many of us have conducted in our classes. To perform this demonstration, 2 – 3 mL of ethanol is placed into a plastic bottle that has two nails punctured into opposite sides of the bottle. After stoppering the bottle, a Tesla coil is touched to one of the nails. A spark jumps from one nail to the other, which initiates the combustion of vaporized ethanol inside the bottle. We recently filmed this reaction with our high speed video camera.

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