Tuesday, November 21, 2006

Coke + Mentos = C02 Eruption!

Looks like Mentos will be banned from planes soon.

Excuse me ...could I have some coke? Thanks...booom!

Mentos Wiki

Due to its high surface area, Mentos expedites a rapid release of carbon dioxide when dropped into a carbonated liquid. 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 fast. 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. As explained on an episode of MythBusters, diet sodas (particularly colas due to their visible brown color) are most commonly used for the experiment. People are often under the illusion that aspartame causes the reaction, but this is not so. The only reason that people use diet sodas is because it doesn't get everything sticky. The resulting geyser (popularly known as a mentos eruption) can shoot as high as 6 meters (20 feet). The record in the hit show MythBusters reached was over 34 feet with the use of a nozzle.


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