Why does soda or any other carbonated beverage increase in pressure and can explode when you shake the container while it is sealed?

Question

I just don’t get why shaking makes the CO2 all the sudden expand

In: Physics

Answer 1

[Shaking soda does not increase the pressure](http://www.youtube.com/watch?v=K-Fc08X56R0&t=0m45s), so you’re asking a loaded question. Also, this was discussed here just a few days ago.

Answer 2

A bottle of soda is pressurized because of carbon dioxide gas in the drink. CO2 is dissolved in the liquid and will fall out of solution on its own until it reaches an equilibrium state. Once that equilibrium is reached, the pressure cannot increase more, because no more CO2 can leave the solution. While shaking a soda can help the gas reach equal pressure sooner, it will never be enough to rupture the bottle on its own. If the soda can survive the shelf, it can survive being shaken.

Edit: I guess I should add for clarity that shaking the soda introduces air bubbles into the solution that act as nucleation sites for the CO2 to grab onto to precipitate out of solution into a gas state. That’s why shaking soda causes an increase in pressure (unless equilibrium has been reached, in which case the pressure will not increase, but air bubbles can stick to the side of the bottle forming more nucleation sites should the volume increase, by opening the bottle for example)