Coke and Mentos Expieriment

We did the coke and mentos experiment at school.We had to write our own experiment about the how to do it.

Making Lots of Bubbles
After a lot of debate, scientists are now saying that the primary cause of Coke & Mentos geysers is a physical reaction, not a chemical reaction!Weird right. Their explanation is this process called nucleation.

All the carbon dioxide in the soda is squeezed into the coke and looking for a way out. It’s going to go to any tiny bumps that it can get onto. Those tiny bumps are called nucleation sites places the gas can grab onto and start forming bubbles.

Nucleation sites can be scratches on a glass, the ridges of your finger, or even specks of dust – anywhere that there is a high surface area in a very small volume.

The surface of a Mentos is sprayed with a lot of microscopic layers of melted sugar. That makes it not only sweet but also covered with lots and lots of nucleation sites.

In other words, there are so many microscopic nooks and crannies on the surface of a Mentos that an incredible number of bubbles will form around the Mentos when you drop it into a bottle of soda.

Since the Mentos are also heavy enough to sink, they react with the soda all the way to the bottom. The escaping bubbles quickly turn into a raging foam, and the pressure builds dramatically.

If you have enough coke you can even make a car. 
Coke and mentos car

The unopened coke and mentos have chemical energy.When you open the coke it realises sound energy and the then when you put in mentos and close the bottle there is chemical energy and potential energy for the suspended mentos.Then when you poke a hole in the cap there is sound energy, at last, the spraying coke creates sound kinetic and gravitational energy