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Mentos and coke is a physical change. In carbonated beverages, CO2 gas is dissolved in the solution. Gases dissolve in liquid just like solids dissolve in liquids. Carbonated beverages go "flat" when the CO2 comes out of the solution and escapes as a gas in the atmosphere. This is why carbonated beverages must remain sealed so they don't go "flat" before they reach the consumer. The release of CO2 is generally pretty slow from an opened bottle. But this is where the mentos come in. Mentos provides nucleation points that facilitate CO2 coming out of the solution phase into the gas phase very quickly. The mentos will rush to the top because it is being pushed out by the increased gas pressure from the CO2 coming out of the solution into the gas phase. In conclusion, the mentos create the gas CO2 to quicken the rapid deflate of the gas within the carbonated bottle.

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https://www.stevespanglerscience.com/lab/experiments/original-mentos-diet-coke-geyser/
https://thewonderofscience.com/phenomenal
https://www.newscientist.com/article/dn14114-science-of-mentos-diet-coke-explosions-explained/
https://www.acs.org/content/acs/en/education/whatischemistry/adventures-in-chemistry/experiments/mentos-diet-coke.html
https://www.scientificamerican.com/article/bring-science-home-coke-mentos/
http://scactivities.cikeys.com/mentos-and-diet-coke/for-teachers/

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Why do the bubbles form on the different things you put in the soda?

The bubbles are made of a gas called carbon dioxide. The soda company puts carbon dioxide in the soda to make the soda fizzy.

Also, the things you put in the soda aren't really as smooth as they look with just your eyes. If you could look at the straw, pipe cleaner, and Mento with a super-strong microscope you would see that they have tiny dents, scratches, and bumps on them.

The carbon dioxide molecules collect on these places and form bubbles which rise to the surface.

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Why do the bubbles form on the different things you put in the soda? The bubbles are made of a gas called carbon dioxide. The soda company puts carbon dioxide in the soda to make the soda fizzy. Also, the things you put in the soda aren't really as smooth as they look with just your eyes.

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2-PS1-2 (Analyze data obtained from testing different materials have the properties that are best suited for an intended purpose)
Will record how the Diet Coke "explodes" and which candy would best suit for this to happen.

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Worksheet the students will fill out after watching the activity.

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Grade Level Explanation:                              Mentos and Coke!

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Grade Level Explanation:                              Mentos and Coke!

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Once you place a Mentos candy in diet coke there is an eruption of soda quickly after! The reaction taking place is gas escaping from the soda because of the Mentos! As everyone in class knows about solids, liquids, and gases. Mentos are a solid and diet Coke is a liquid. When these two mix, a gas forms.  All three phases of matter are shown in this activity.

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For second grade students. They will try different properties (candies) within the Diet Coke to see whether or not they see a difference in what is happening in the Diet Coke bottle. (if it fizzes or no reaction)

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The Mentos will be placed quickly into the bottle of Diet Coke and shortly after the eruption will occur!

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This is Dr. Fatila's response to my initial question of the science behind the mentos and coke "explosion".

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My initial question to Dr. Fatila, a professor in the College of Engineering and Science profession. She is a professor of physics and chemistry. 