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Friday, March 27, 2009

Mentos and soft drink reaction

First popularized by Steve Spangler on 9News in 2005, which resulted in Internet coverage of the incident, a Mentos mint expedites a rapid release of carbon dioxide when dropped into a carbonated liquid, such as a soft drink, because of its high surface tension. Also, the small dents in the surface of the candy provide a great site for nucleation, which is how the carbon dioxide molecules can escape so rapidly. The escaping bubbles quickly turn into a raging foam, and the pressure can build dramatically in a restricted container such as a two-liter bottle.

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