|MadSci Network: Other|
Hi Elissa, I don't think it's really possible to shake a soda can enough that it bursts without doing anything except shaking it, either. If you added enough heat (I'm guessing quite a bit of heat would be required) to the soda in the closed can, you could cause enough gas to be forced out of solution and into the air space to weaken the can enough to cause it to burst. Exsolution of CO2 gas will occur in order to re-establish equilibrium of the system at the different temperature. You're right about equilibrium conditions between the amount of gas in solution and that in the air space in the closed can. Though, apparently one CAN force a can to swell by shaking it if the soda is warm (that's what my source tells me, and I'm inclined to believe experimental evidence over my own reasoning). I'm not exactly sure why this would be if the CO2 dissolved in the soda were in equilibrium with the gaseous CO2 in the air space at the warmer temperature. Maybe warming the soda without agitating it doesn't force carbon dioxide out of solution very rapidly, and only upon agitation does the gaseous CO2 leave solution with enough force to warp the integrity of the can. I'm also not sure about your bubble formation idea, though that probably plays a role. Whenever you heat water in a pot on the stove, dissolved gases in the water exsolve. If you keep the lid on the pot and let the water boil, sometimes the lid will rattle a bit. The same principle should apply to the soda. Since the exsolved gas is trapped in the can in this case, it will push against the sides of the can. Theoretically, if the pressure of the exsolved CO2 on the sides of the can is great enough, the can should burst. Of course, the soda can makers have probably made sure that their cans can withstand the stresses that extreme environmental conditions on Earth and curious people might inflict on their cans. Sorry for the lengthy response. Hopefully this explanation makes sense. Sarah Earley CU Boulder
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