What happens when you put Mentos in Diet Coke?
September 08, 2011 1:35PM
However, this is not the primary reason for the release of carbon dioxide gas . If you look at a Mentos with a powerful microscope, you will see that it has a very rough surface, that looks somewhat like pumice. This bumpy surface attracts the carbon dioxide in the diet coke to the point where a bubble forms, at which point it's released and rises to the top of the coke. Multiply this by a couple million times around the entire Mentos, and you have a fountain!