What makes mint in coke explode?

When mint candies are dropped into a bottle of Coke, the rough surface of the candy acts as a nucleation site for carbon dioxide gas. This means that the carbon dioxide gas bubbles can form more easily on the surface of the candy than on the smooth sides of the glass bottle. As more and more carbon dioxide bubbles form, they start to push against each other and the sides of the bottle. This pressure eventually builds up to a point where the bottle can no longer contain the gas and it erupts, sending Coke and foam everywhere.

The amount of sugar in Coke

The amount of sugar in Coca-Cola also plays a role in the eruption. Sugar acts as a surfactant, which means that it reduces the surface tension of the liquid. This makes it easier for the carbon dioxide bubbles to form and grow.

The temperature of the Coke

The temperature of the Coca-Cola also affects the eruption. Warmer Coke will erupt more violently than cold Coke because the carbon dioxide gas is more soluble in cold liquid. When Coke is heated, the carbon dioxide gas becomes less soluble and comes out of solution more easily.

The size of the bottle

The size of the bottle also plays a role in the eruption. A smaller bottle will erupt more violently than a larger bottle because the pressure builds up more quickly in a smaller space.

Other factors

Other factors that can affect the eruption include the type of mint candy used, the amount of candy used, and the shape of the bottle.