Fizzy Powerful Fun With Mentos July 3, 2007Posted by Mrs Weird Scientist in Cool Experiments, Easy As Pie, Physical and Chemical Reactions.
You might have tried out the Mentos Eruption yourself. It’s the one where you drop a roll of Mentos candy into a bottle or can of Diet Coke. The frothy idea is the work of a quirky science educator called Steve Spangler. The video above was made by Mentos after Steve suggested that they slow down a recording of the reaction, so we can see all the nifty stuff that happens.
There are different ideas about how the reaction occurs. Various additives and properties give the reaction its powerful kick. The caffeine, aspartame, potassium benzoate and gases all fuel the eruption. The Mentos have lots of air holes-or pores-which are the perfect place for carbon dioxide bubbles to form. When the Mentos drop into the Diet Coke, loads of these bubbles form on the candy surface. As the Mentos quickly sink down through the Diet Coke, carbon dioxide gets released by the Diet Coke. All that temperamental pressure sends the liquid shooting up into the air!
You can see more about the Mentos Eruption on Steve Spangler’s website.