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Originally Posted by rsl12
The pressure argument doesn't sound right. The beer was open, with a lime on top, and not frozen *until* he put the lime in, right?
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As I said - the lime causes the beer to outgas - the outgassing costs energy - the only place for that energy to come fr is a drop in the temperature - also the freezing point is reduced by disolved carbon dioxide, so removing the CO2 makes the beer colder AND easier to freeze.
Result = push the lime in and it turns to a beer slushie.