I have heard conflicting stories about what happens when you shake/open a
can of soda.
I have gathered that shaking a can of soda does NOT increase the internal
pressure. The system is still in equilibrium. This can be felt by
squeezing the can. However, the soda will spray out when you open the can.
Is this because the CO2 bubbles are forced out of solution (after shaking)
and thus are more likely to come out of the can when it is opened?
If you do this with a 2L bottle (shake, open, recap, shake again), the
internal pressure appears to increase (felt by squeezing the sides).
Can anyone offer a simple physics/chemistry explanation of what's going on?