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This blog provides commentary on interesting geological events occurring around the world in the context of my own work. This work is, broadly, geological fluid dynamics. The events that I highlight here are those that resonate with my professional life and ideas, and my goal is to interpret them in the context of ideas I've developed in my research. The blog does not represent any particular research agenda. It is written on a personal basis and does not seek to represent the University of Illinois, where I am a professor of geology and physics. Enjoy Geology in Motion! I would be glad to be alerted to geologic events of interest to post here! I hope that this blog can provide current event materials that will make geology come alive.

Banner image is by Ludie Cochrane..

Susan Kieffer can be contacted at s1kieffer at gmail.com


Wednesday, June 16, 2010

World Record for Mentos-Diet Coke Geyser Eruptions


For the past two years there has been a craze amongst students to set world records for eruptions caused by mixing Mentos (mints) and Diet Coke.  On June 6(?), a new world record was set by students at Changchun University. Clothed in blue raincoats (provided by their University!), they set off 2,175 simultaneous eruptions, shattering the two-year old record of 1,360 set by students in Belgium.  (I may not have the previous record correct.)

The geyser eruptions are triggered when Mentos are dropped into the Diet Coke.  The rough surface of the Mentos triggers nucleation and growth of bubbles of carbon dioxide (CO2), and the expansion of the gas drives the foamy mess out of the Coke bottle.  Diet Coke is the preferred beverage because it's not as sticky as the other options when it sprays all over the place!

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1 comment:

Muneer Ahmed said...

Wow! What an eye opener this post has been for me. Very much appreciated, bookmarked, I can’t wait for more! Jenny