Thread: Energy flow View Single Post
 I wish I could understand this as what you say still does not make sense to me. The fact that water freezes at a lower temperature under pressure some how does not explain why the suspended object has an increase in potential energy. I did not say it was an especially big object as anything suspended right at the water survice would be lifted and therefore have a net increase in potential energy. I would suspect that the same is true if you could support all the ice that forms above the water surface. Of course this increase would be offset by a decrease in the remaining water/ice. Oh here is how I see it although I know my logic has to be flawed. Energy of object = X Energy of Water = Y Energy of Cooling substance = Z Energy needed to freeze water = F Total energy of all these = E So E = X + Y + Z So as Y and Z exchange energy I would see it as E = X + (Y-F) + (Z+F) But as the water freezes the potential energy of X would increase. So where is this come from. I just cannot see how taking energy away from water would increase its ability to do work (lifting object). Even if it take a lower temperature to freeze the flow of energy is away from the water. I am not questioning any of the answers above, I am just trying to understand what you are saying.