Mysterious 'Eruptions' When Mixing Coca-Cola and Crown Royal

[bookred]

I have noticed recently that when I pour coca-cola ( from a regular red can ) into a plastic cup then mix crown royal in it that this produces "eruptions", small streams of liquid shooting up from the surface of the drink. What is causing these? I have mixed drinks many times and never noticed this in any other combination

 

[Sakha]

This could be similar to the known mentos-soda reaction, where the gum arabic in the mentos react with the soda gas.

 

[sir-pinski]

.This phenomenon is actually quite common when mixing carbonated beverages with alcohol. The carbon dioxide gas in the soda creates pressure when mixed with the alcohol, causing the liquid to bubble and "erupt" from the surface. This is also known as the "nucleation effect" and can be seen in other combinations such as champagne and orange juice or beer and hard liquor. The amount of carbonation in the soda and the strength of the alcohol can affect the intensity of the eruptions. It is completely normal and safe, but it's always a good idea to mix drinks slowly to avoid spills. Cheers!