How many bubbles are inside a can of coke before it is opened?
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M$9 Answers
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M$If you were to look inside a closed coke can, you would only see the dark coke liquid, no bubbles.
What actually causes the bubbles to form is the change in "atmospheric pressure" or the difference between the pressures inside the can when it is opened, and outside the can.
When you open a can, the gas inside the liquid coke comes rushing out and creates the bubbles.
If you were to open the can in a place where the atmospheric pressure was the same in as inside of the can, you would not see any bubbles.
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M$
Guesstimate
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M$If you absolutely want to count "bubbles" I guess you can proceed the following way:
The gas floating on top of the coke must be under higher-than-atmospheric pressure and be composed of coke vapour, CO2 gas and air (unless it's bottled in vacuum).
We assume it was bottled at room temperature (no point in refrigerating pre-bottled coke, at least not that I know of). With that, we can estimate the number of moles of air (or rather, the different components of air) given the volume available for air before the can is sealed.
If we were to measure the pressure inside the bottle at room temperature, we would be be able to find out what volume of the gas is not from air (through PV = nRT, we had just calculated n, then using P, R and T we find the volume of air. The gas' volume minus the volume of air gives what's left).
Using this, we'll suppose that the vapour pressure of coke is the same as the vapour pressure of water. Coke is mostly water, after all. Once we account for the volume of water/gas vapour in the gas, the remaining volume must come from CO2 from the coke (minus the negligible CO2 content of air).
If you were to know the bottling concentration of CO2, you subtract from the bottled moles of CO2 the moles you found hovering over the coke in the gas; what is not in the gas is dissolved in the coke.
Thus, you take the molar amount of CO2 that has to still be dissolved (after accounting for the gas over the coke, that is) and multiply it to get how many individual molecules you have. If you want to consider that a bubble, then there you go.
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M$You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$
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M$
Using the above numbers and skipping all the boring mathematics the answer is: 21,208 bubbles
and, yes coca cola bubbles do contribute to global warming.
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M$
How could 48 oz. of Co2 be included in a can totalling only 12 oz??Absurd! Or are you referring to volume at atm. pressure, not weight? Also, the "global warming "has been shown not to be man made and this is proven by the fact that (look at the graphs that Al Gore shows when superimposed on each other) the Co2 increase occurrs about 800 yrs AFTER the temp increase thus is the effect NOT the cause ! This is like when you open a can of soda from the fridge and the CO2 comesd out (bubbles) because of the temp increase. The CO2 dissolved in the oceans (2/3 rds earth surface ) comes out when the temp increases. "Glo Wrm" is a scam designed to tax us out of everything and make big $ on the cap and trade scam -Gore is an owner of a 'carbon credit'trading company!Do research yourself to confirm.
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M$
@babooo: The bubbles are made of carbon dioxide, which is actually dissolved in the soda before it's opened. Once it's opened, the carbon dioxide comes out in gaseous form and makes the bubbles that you see. So the bubbles aren't in there because they aren't made until the can is opened, but the carbon dioxide that they are made of is.
but the bubbles have to be inside - or else how do they come out! i mean like umm if something comes out of a can it must be inside first - unless there is some sort of hocus pocus going on?