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Home » Diet » Here’s What Really Causes Diet Coke And Mentos To React – Mashed

Students in Dr. Tonya Coffey's Appalachian State University's physics class tested the science behind the volatile Mentos/Diet Coke reaction, publishing their results in the American Journal of Physicsin 2008.They, too, concluded that the "surface roughness" of the Mentos is "one of the main causes of the reaction."

As it sinks, the Mentos produces more bubbles, which react with carbon dioxide in the soda, rewarding you with a Diet Coke geyser. Speed also matters, and the faster the Mentos sinks, the larger the eruption. Mentos are dense candies, which aids the sinking process a factor the study explored by comparing reactions made with whole Mentos versus crushed ones, the latter of which resulted in weaker eruptions. Additionally, diet sodas produce bigger reactions than regular sodas, because diet sodas such as Diet Coke contain potassium benzoate and the artificial sweetener, aspartame, as opposed to sugar or corn syrup. "These ingredients reduce the work required for bubble formation, allowing carbon dioxide to rapidly escape from the soda,"Coffey and her students found, after comparing the "contact angle for aspartame and water in contrast to pure water or sugar water."

And while Snopes long ago debunked the rumor that eating Mentos and drinking Diet Coke can kill you, exercising caution when attempting to mix these two products together is recommended. However, the American Chemical Society provides step-by-step instructions on how to safely make a Mentos soda fountain, so this is one experiment you can try at home.

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Here's What Really Causes Diet Coke And Mentos To React - Mashed

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Home » Diet » Here’s What Really Causes Diet Coke And Mentos To React – Mashed