Ever since chemistry teacher Lee Marek appeared on "The David Letterman Show" in 1999 to show of his exploding Mentos experiment, people everywhere have been fascinated by the bubbly reaction. With the advent of YouTube came a bevy of user-uploaded experiments — including the legendary fountain creation by Fritz Grobe and Stephen Voltz of EepyBird. Hundreds of thousands of videos later, we're still giggling over the lengths people will go to experience a "Mentos eruption."
The most-recent sticky adventure to go viral comes from famous YouTuber Hajime, who decided last year to fill a tub with Coke Zero and then jump in with hundreds of Mentos taped to his body. It doesn't have quite the dramatic effect as say, an entire suit covered in the candies, but if lukewarm bubbling cola sounds appealing, you'll love it.
As for the reason why Mentos bubble so strongly when paired with soft drinks is because the structure of the candies allows carbon dioxide bubbles to form extremely rapidly.
"Water molecules like to be next to other water molecules, so basically anything that you drop into the soda that disrupts the network of water molecules can act as a growth site for bubbles," Tonya Coffey, a physicist at Appalachian State University told New Scientist. "And if you have rough candy with a high ratio of surface area to volume, then there's more places for the bubbles to go."
Right. Just make sure you take a long shower afterwards.
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