It would have to say it is the water as well. If anything the pressure of the gas goes down with temperature and it also increases solubility. So the force on the bottle is getting small from the gas. Water on the other hand gains a significant amount of volume as it freezes.
The answer is actually that the bottle breaks because of both the water and the gas. As the soda freezes, it expands, eventually the frozen soda expands so much that the CO2 gas in the bottle is compressed to the point where the pressure exerted by the gas on the plastic bottle makes the bottle burst. If the bottle breaks strictly due to the water expansion you would expect to see stretch marks in the plastic bottle around the areas where the bottle broke. Normally a bottle splits fairly cleanly, indicating a sudden release of energy, the energy of the compressed CO2 gas. So it's both.
I think what Rabn is saying is that the gas inside does become more soluble as the temperature decreases. However, since water is one of those nifty things that expands when it freezes, the gas actually starts getting compressed into very small spaces in the bottle. Eventually, the buildup of that compression results in extreme pressures that cause it to explode. You can tell that because the glass cracks cleanly, indicating a quick fracture, and not a slow process like the ice stretching the glass till it breaks
The gas that is compressed into very small spaces in the bottle, you mean that the gas is outside the liquid or compressed in the liquid itself?I honestly don't know. Rabn sounds like they're (she?) trying to say that the gas is compressed outside of the water, but I was just trying to reword it from what I understood Rabn to be saying.
(the solubilaty is higher at lower temperatures. Expectations: more gas in the fluid beter solution, but you state it is compressed more because of expanding of the frozen water ==> the gas is outside the freezing water?)
Dear Polleke;
Have you ever seen such frozen/broken bottles and cans?
I have seen them for a few winters, because we owned a food store.
If you keep in mind that the frozen coca or soda is still keeping the original shape of the can/bottle quite well, then you know that the freezing process has destroyed the container and that CO2 is more or less only a spectator.
I hope it may help for a better understanding.
Good Luck!
ARGOS++
Dear Polleke;
Additional word about CO2:
Specially in the clear frozen soda (mineral or fruits) you can see several bubbles different shapes with a diameter of ~0.5 till ~2 cm, indicating that during the freezing process a little CO2 has been released; maybe according to the release of total pressure in the moment when the container starts to break.
Good Luck!
ARGOS++
The answer is actually that the bottle breaks because of both the water and the gas. As the soda freezes, it expands, eventually the frozen soda expands so much that the CO2 gas in the bottle is compressed to the point where the pressure exerted by the gas on the plastic bottle makes the bottle burst. If the bottle breaks strictly due to the water expansion you would expect to see stretch marks in the plastic bottle around the areas where the bottle broke. Normally a bottle splits fairly cleanly, indicating a sudden release of energy, the energy of the compressed CO2 gas. So it's both.
another general question: the CO2 is located in the fluid normally , right?
Or is there a Chemical equilibrium between the CO2 in the liquid and CO2 outside the liquid (in the bottle), meaning there is also CO2 outside the liquid.
the bubbles you are talking about, you do mean bubbles in the frozen soda?
If so: how do you know that those bubbles mean that CO2 escaped?
Cant those bubbles simply be the CO2 in the frozen liquid?
well, I never realised that a simple soda could cause so mucht problems haha
PS. I do not understand what you mean by: maybe according to the release of total pressure in the moment when the container starts to break.
Or do you mean that maybe a bit of the CO2 escapes at the moment when the total pressure in the bottle is "gone" because of the breaking of the bottle? (meaning that because the bottle breaks the CO2 in the bottle can simply escapes?)
We have only three possibilities for the content of these bubbles in the frozen soda:
Air or/and water-steam and/or CO2.
But there is no way how Air could enter the frozen body, and to generate enough water steam/gas at 0°C is nearly impossible, so finally the only possibility left is CO2.
You state that no air could enter the frozen body, I can agree on this, but what with air that is allready in the cola?
Or is there no air in the cola?
It makes me wonder how they produce the cola (not the recipe, but how they bottle the cola=> they make the bottle vacuum and enter the cola and CO2 or...)
I can imagine that when you put the cola in the bottle , you also mix it with air when you spray it in the bottle etc...
Dear Polleke;You state that no air could enter the frozen body, I can agree on this, but what with air that is allready in the cola?
Or is there no air in the cola?
It makes me wonder how they produce the cola (not the recipe, but how they bottle the cola=> they make the bottle vacuum and enter the cola and CO2 or...)
I can imagine that when you put the cola in the bottle , you also mix it with air when you spray it in the bottle etc...
I don’t know exactly how they produce cola or soda, but one should anyway be clear:
You can’t add the CO2 as a liquid or as a solid, so you have to add it as a gas.
So they will bubble it in one or other way through the soda and at the start some CO2 will escape to build the required pressure for the system; and exactly this escaping CO2 will drive out the remaining air of the liquid.
That tells me that I haven’t to believe that some air will remain in the cola sold, because also during the bottling process some CO2 will escape and protect the liquid from collecting air.
Good Luck!
ARGOS++
Is this just because you "push" so much CO2 true the cola that the air gets flushed away, or has this something to do with the solubility of CO2 versus air?You are quite close.