I took a very cold soda out of the freezer. It was completely liquid; no ice. As I opened the cap the top of the liquid froze and slowly the rest of the soda from top to bottom froze as well.
2006-12-13 07:29:10 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Water's phase diagram (gas, liquid, solid) is is a function of both temperature and pressure. When the can is sealed, it is pressurized (at the factory to keep the CO2 dissolved). At higher pressure water can exist as a liquid at lower temperatures (the opposite is true at lower pressure - i.e. in high mountain villages water boils at something like 70-80C makes crappy coffee and complicates cooking!).
Once you open the can, the pressure drops to standard atmospheric, and your liquid is below the standard 0C freezing point.
2006-12-13 07:53:41 · answer #1 · answered by Leonardo D 3 · 1⤊ 0⤋
When something freezes it expands. Since the can is pressurized, the soda can not expand and can not freeze. As soon as you open the can, it can expand and it already cold enough to freeze.
That and what the guy said about pressure AND temperature affecting the freezing point.
2006-12-13 15:51:03 · answer #2 · answered by Captain Jack 6 · 1⤊ 0⤋
Hi. Hi ice formation depends on temperature AND pressure. When you released the pressure the melting point was raised.
2006-12-13 15:32:18 · answer #3 · answered by Cirric 7 · 2⤊ 0⤋
Frozen water takes up more space; therefore, in order to become solid, the soda needs more room to expand. Water (and water-based solutions) form sort of a latticework when frozen.
2006-12-13 16:01:14 · answer #4 · answered by mertensiavirginiana 1 · 1⤊ 1⤋
mmmmmcarbonated pressure. works opposite of a pressure cooker where the heat is increased with pressure
2006-12-13 15:37:46 · answer #5 · answered by Anonymous · 1⤊ 0⤋
probably because of the sealing
2006-12-13 15:31:31 · answer #6 · answered by toonydemon 2 · 0⤊ 0⤋