Chemistry question?

Question

An aluminum can of a soft drink is placed in a freezer. Later, the can is found to be split open and its contents frozen. Work was done on the can in splitting it open. Where did the energy for this work come from?

Answer 1

The work was performed by the expansion of the freezing water in the soda (also gas driven out of solution by freezing as well). The energy to do this freezing was performed by the freezer. Presumably, if you could measure energy use of the freezer accurately enough, it would be found to use slightly more electricity to operate than if the can had not in there (all else being the same).

If you want to get really "anal" about it; the energy to freeze the soda and split the can would be slightly more than the energy needed to freeze an equal amount of soda in a container that would stretch so the pressure stayed constant during freezing. This difference is caused by the fact that increasing pressure lowers the freezing point of water (make it harder to freeze it; because the water is trying to expand as it freezes). Now, I think you are getting too much information