365体育投注

YOLO COUNTY NEWS

Community News

Explorit: The science behind viral soda fountains

By Sara Thompson
Special to the Enterprise

The popular at-home experiment of dropping Mentos into Diet Coke became viral on the internet in 2005.

Prior to this, it had been featured on evening programs and news affiliates in the late ’90s and early 2000s. But before the famous pairing of Mentos with Diet Coke, there was another popular variation in the 1980s.

365体育投注Life Savers had a flavor called “Wint-O-Green” that could fit through the tops of soda bottles and create the same soda geyser we love now. In the mid- to late ’90s, the candy size increased and could no longer fit through the bottle top, but Mentos was found to produce the same effect and became the go-to candy for soda geysers.

365体育投注Many assume the reaction to produce the tall soda geysers is a chemical one, similar to baking soda and vinegar, but it is in fact a physical reaction!

365体育投注The soda has carbon dioxide dissolved in the solution that is held under pressure, when you open a soda you hear a hiss, that is the pressure releasing and the bubbles that form are some of the carbon dioxide expanding and being released in its gaseous state.

365体育投注Not all of the carbon dioxide escapes just from opening the soda, which is why it stay bubbly for a while after opening, but it will begin to precipitate, or leave, the solution, resulting in an eventual flat soda.

365体育投注When you add a Mentos to the solution, it introduces a new means for the carbon dioxide to escape. Mentos are not entirely smooth like they appear, they are actually quite rough when looked at under a microscope. When dropped into the soda, the rough texture creates more surface area for the carbon dioxide to become gaseous and expand.

365体育投注Because the Mentos is denser than the liquid, it sinks, helping to release more and more carbon dioxide as it goes down, seeding more bubbles above. The rapid expansion of gases causes the liquid solution to erupt out the top because it has nowhere else to go.

365体育投注One of the reasons that Diet Coke works better than regular is because the artificial sweetener creates a weaker surface tension than the sweeter Coke. When trying this at home, remember to do it outside, as you will make a huge mess!

Try the experiment with different flavors of soda and with different flavors of Mentos, do they react the same? Does cutting up the Mentos or crushing it up also change the experiment or share the same results?

————

Explorit’s coming events:

* Do you value science education for children in our community? Explorit Science Center has been providing hands-on science opportunities in Davis for 38 years! Like many small businesses the closures have had a significant impact on our income. Now is a great time to consider a donation to help Explorit continue to educate and inspire the scientists of tomorrow:

* Continue to support Explorit during this uncertain time by becoming a member. Membership grants you free visits to Explorit’s regular public hours, discounts on events, camps, and workshops, and gives you ASTC benefits. For more information or to purchase or renew your membership visit or call Explorit at 530-756-0191.

* We are still taking Summer Science Camp registrations and have spaces still available. We are monitoring the situation surrounding COVID-19 and recommendations for health and safety. Modifications to space and class size may occur to ensure the health and safety of campers. Any changes to camp information will be sent out to current registrants and posted on our website before the end of May. Registration available online at .

* To help slow the spread of COVID-19, Explorit will be closed until public health restrictions have been lifted or eased. Our staff is working remotely and will be answering emails, please contact us at [email protected] with any questions. We are not currently accepting recycled material donations.

— Explorit Science Center is at 3141 Fifth St. For information, call 530-756-0191 or visit , or “like” the Facebook page at .

CalMatters

Special Publications

Quick Links

Use of this site constitutes acceptance of our Terms of Service (updated 4/30/2015) and Privacy Policy (updated 4/7/2015).
Copyright (c) 2020 , a family-owned local media company that proudly publishes the , , Davis Enterprise, , , , , and other community-driven publications.