Tops You Keep
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how is tapping on a drink can's top supposed to keep it from blowing up when you open it?
this thought came to mind last night, when i was tapping the top of a can of root beer. i wondered how the act of tapping its top, kept the fizz down
any insight? or is this pretty much more myth than fact?
by the by, i posted the question here cause i figured it had to do with the chemistry of carbonation/fizz.
if this catagory is unfitting, where do you think i should post it?
CO2 in a can is under pressure, but unless it is shaken, it isn't going to spew out when opened. After all, that wouldn't do well for advertising, if half the contents were spilled out each time it was opened.
So tapping on it matters little, except to perhaps draw attention to you. And sometimes that may be what is desired.
But yes, it is a question that has a lot of chemistry behind it. Saturation, supersaturation, and the effects of pressure. And cold soda will fizz less then warm soda.
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