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Endothermic reaction: very, VERY cool.

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Uploaded on Jan 26, 2012

You see that pun in the video title? See it? I'm not even sorry. Not even a little bit.

Mr Bell manages to pull off the impossible here, as a demonstration devoid of any fire or explosion still manages to draw appreciative gasps from the crowd. (as well as marginally accurate answers to his questions). The reaction between ammonium chloride and barium hydroxide is endothermic, and cools down the wet wooden block beneath the beaker enough to freeze the water, sticking the beaker to the wooden block.

As well as this excitement, the video also contains Mr Bell managing to burn his nostrils out with ammonia and then accidentally insinuate that one of his class may have wet themselves. It's all in a day's work.

P.s. Bonus points for saying nice things about Mr Bell's new glasses.

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