This week in Jonah class, we conducted the much-anticipated Coke and Mentos experiment.
When we dropped the Mentos into the Coke, within seconds, the Coke exploded out from the top of the bottle! 🙂
The thing that makes fizzy drinks bubbly is the carbon dioxide that is pumped in when they bottle the drink at the factory. It doesn’t get released from the liquid until you pour it into a glass and drink it, some also gets released when you open the lid (more if you shake it up beforehand). This means that there is a whole lot of carbon dioxide gas just waiting to escape the liquid in the form of bubbles.
Dropping the Mentos into the Diet Coke speeds up this process by both breaking the surface tension of the liquid and also allowing bubbles to form on the surface area of the Mentos.
We had a lot of fun conducting this experiment, despite the messy aftermath 🙂