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Old 02-28-2009, 01:04 AM   #1
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Default Volumes of CO2

Can someone explain to me what volumes of CO2 means? I know how to carbonate a beer right I just want to know what the volume means, is it part's per million or a percentage of the liquid, or ????

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Old 02-28-2009, 01:12 AM   #2
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Listen to this brew strong episode. It's all about carbonation, and they explain it very well.

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Old 02-28-2009, 01:19 AM   #3
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I did listen to that podcast I may have been slightly drunk when I did so I don't think I got that part.

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Old 02-28-2009, 02:00 AM   #4
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1 volume is 1 liter of CO2 at 1 atmosphere in 1 liter of fluid (beer). You can substitute gal for liter.

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Old 02-28-2009, 02:18 AM   #5
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Quote:
Originally Posted by enderwig View Post
Listen to this brew strong episode. It's all about carbonation, and they explain it very well.
The same one where they claim CO2 makes up 10% of the atmosphere? Beachfront villa in the shadow of the Transantarctic Mountains (erm, Islands), here I come!

(Sorry, I had to. Not one of JZs and JPs finer moments, though they do a great job when it comes to brewing!)
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Old 02-28-2009, 05:32 AM   #6
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Quote:
Originally Posted by Got Trub? View Post
1 volume is 1 liter of CO2 at 1 atmosphere in 1 liter of fluid (beer). You can substitute gal for liter.

GT
That's what I was looking for, thanks.
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Old 02-04-2010, 12:51 PM   #7
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So I know there are tools out there to calculate volumes of CO2 in beer but does anybody have the manual calculation? I like to know how these things work myself.

Also I've seen suggested volumes for different styles of beer go pretty high, over 5 volumes, does anybody know what volume it would take to get a bottle bomb? How much pressure can a typical brown long neck hold before breaking?

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Old 02-04-2010, 07:22 PM   #8
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Carbonation calculations and tables are based on Henry's Law

http://en.wikipedia.org/wiki/Henry%27s_law

You could also use the ideal gas law equations if you're concerned about volumes in a specific vessel size.

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Old 02-04-2010, 08:14 PM   #9
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Adding on to ideal gas law:

there are 22.4 liters in one mole of gas, so a beer carbonated to 2 volumes of co2, will have about 0.0892 moles of gas per liter, that makes 1.688 moles of gas in 5 gallons at 2 volumes. That is equal to about 0.163 pounds of CO2.

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Old 02-04-2010, 08:57 PM   #10
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Quote:
Originally Posted by Got Trub? View Post
1 volume is 1 liter of CO2 at 1 atmosphere in 1 liter of fluid (beer). You can substitute gal for liter.

GT
Close.

1 volume is 1 liter of CO2 at 20°C at 1 atmosphere in 1 liter of beer.

(OP, this also means 1 volume is 5 gallons of CO2 at 20°C at 1 atm in 5 gallons of beer)
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