Ways to keep Carbonated drinks from going "flat"??
Posted 10 June 2005 - 03:27 AM
I am new on this forum. For my science fair, I am considering devising ways to keep carbonated, bottled (soft drinks) from going "flat", or, basically losing the bubbles.
So, for my question. Do you guys have any ideas, or things that I can do?? It can be anything, but preferably not too complicated, and possibly somthing I can engineer or build.
I look forward to hearing your Ideas!!!
Posted 10 June 2005 - 05:47 AM
keep it closed
About the carbonated thing...
iM NOT SURE THATS POSSIBLE WITHOUT MAKING THE DRINK HAZARDOUS TO HIMAN CONCUMPTION. i HATE CAPS lock.
Posted 10 June 2005 - 06:59 AM
Posted 10 June 2005 - 07:15 AM
Posted 10 June 2005 - 09:14 AM
keeping it in the fridge would be a more reasonable method and obviously with the lid tightly on.
Posted 10 June 2005 - 01:09 PM
The CO2 is in equilibrium with dissolved carbonic acid. You want to increase the pressure as the equilbrium will shift to oppose the change and dissolve more gas. The dissolving process is (if memory serves) exothermic so once again if you lower the temperature then it will resist the change and dissolve more gas. So keep it cold and pressurised, thats your best bet.
Posted 10 June 2005 - 06:46 PM
Posted 10 June 2005 - 07:11 PM
Sorry - nothing valuble to contribute, but the consencious seems to go for pressure and BenSon's science
Posted 10 June 2005 - 08:16 PM
keeping it cold will definatel keep it from losing carbonation, hence why pop is usually stored cold. also i heard adding milk to pop keeps it from fizzing (or is it the other way around?). as for an attachment you could make one that increases pressure in the bottle which will keep more co2 dissolved.
I already mentioned an attachment thing that they already made. Um, tommlo, why does your ranking just say "registered user"?
Posted 20 June 2005 - 01:23 AM
Posted 20 June 2005 - 01:38 AM
Zem: Er, five.
Marvin: Wrong. You see?
Posted 20 June 2005 - 10:58 AM
Well what I was talking about before in post #7 is only in a closed system. If the cola was left to freeze without being contained then the CO2 would escape and once the temperature normalised it would not be able to redissolve it. However if the system is kept closed then once to temperature pressure ect was returned to normal then the cola should be the same. As for taste well I have no idea but if I had to put money on it I'd bet it was just your mind playing tricks on you or it had still not returned to equilbrium.
Hmmmm just curious, if getting the drink colder slows down the process what happens if it gets frozen? Does it reatin it's "fizzyness" fully when thawed? If I recall right when I've drank pop (yes, "pop" is a midwest thing, heh so "soda" if you're not from here) that was frozen once it tasted different, though that could be just my mind playing tricks on me.
Posted 21 June 2005 - 08:52 AM
Posted 22 June 2005 - 04:56 AM
Posted 22 June 2005 - 05:14 AM
Perhaps I should scrap the whole "inventing a gadeget" idea, and see if freezing/keeping it cool works. Also the question should have been, How do you keep carboanted drinks from going "flat" when OPENED?? (I forgot the "when opened" part).
Just so you guys know, I am only 14 so don't get too complicated, OK??!!
We have been learning all about particles and matter in class, so would I be right in saying, that when the particles (The CO2 or "bubble" particles) are chilled/ frozen, they lose energy (and when frozen, cannot move freely) so thatís why they don't escape as quickly or when frozen they don't escape at all???
Am I correct???
Also, can you get a device that can measure the amount of gas in a liquid???
And if the cola lost the fizz could you "re-fizz" it by pressurizing it with CO2 (or basically adding in some more CO2???
Cos, there is a stage (during manufacturing??) when the cola is not carbonated, right??? So when the cola loses its carbonation (is that actually a real word??!!) couldn't you just use the same process, and re-carbonate it???
Finally, BenSon, when you say a "closed system"(post 13 on this thread), do you mean, if the bottle was not opened???
Sorry if I sound dumb, and if I have gone on for ages!!!!
Posted 8 February 2010 - 10:49 PM
Posted 11 February 2010 - 01:09 PM
If you leave the bottle closed, CO2 in the liquid is going to reach equilibrium with the gas inside the bottle. So, whatever you do, you will always lose some CO2.
The only way to prevent that, is to have CO2 already in the gas phase (the little we have in our air is not enough).
Posted 11 February 2010 - 04:50 PM
Carbonated drinks stay carbonated because there is a layer of Co2 in the bottle, Between the liquid surface and the bottle cap, the same applies to beer kegs.
In the case of the beer keg, we inject a mixture of 30% Co2 and 70% nitrogen into the keg (Beer naturally produces Co2 but this process helps a lot.
In the absence of a 70:30 gassing system, try this.
Pour your drink, then squeeze the bottle so the liquid is nearly at the bottle neck and the air is squeezed out, then screw the cap on tight. it has the same effect.
(Doesn't work too well when the bottle is nearly empty)
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Posted 11 February 2010 - 05:16 PM
Well, dont they make those things you screw onto bottles that you pump to keep the pressure up so it doesnt gradulaly go flat. I dont imagine this would work though.
it helps since every time you open it and reclose it the soda has to build up pressure again untill it reaches equilibrium.
by building up the pressure first prevents the soda from doing it by itself.
but it will still go flat after a while
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