0 Members and 1 Guest are viewing this topic.
The answer is that when you open the bottle and permit the CO2 to escape, the liquid loses quite a bit of solute (the previously dissolved gas). Adding a solute to a liquid depresses the freezing point; conversely, removing the solute raises the freezing point.
"The pH of the soda (ginger to our Glaswegian readers) didn't suddenly change"Oh yes it does, and there's a fairly well known demo experiment using a pH indicator that proves it.In any case, it's clear that a lot of CO2 leaves the solution so the freezing point will rise.The latent heat of fusion of ice is about 80 cal /gram so, at best the CO2 loss could freeze about 4 grams of water into ice. I doubt anyone would notice that.
That figure looks like the right sort of effective power.
60KW is a fair estimate of the power released (mainly as heat) by a car engine.