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ikafka · 02-09-2012, 01:45 PM

Does anyone know if after bottling with corn sugar , the alcohol content of the beer changes while carbonation occurs?

**aiptasia** · 02-09-2012, 01:49 PM

Slightly, but not enough to change it that much. Beersmith might be able to tell you how much alcohol is added. I doubt it's anything above a couple of tenths of a percent.

**unionrdr** · 02-09-2012, 02:08 PM

Well,from what I've seen al the different ABV formulas have numbers ranging from .2-.5 % depending on which you use to calculate ABV. There was a thread on this some time last year. Try a search.

phenry · 02-09-2012, 02:15 PM

5 oz of corn sugar will yield about 1.003 SG, and assuming that's fully fermented, you net about 0.4% for a 5 gallon batch.

That's just based on my math, but I'm sure you'll end up with a similar number no matter which way you cut it.

Jayhem · 02-09-2012, 02:53 PM

I've always heard it adds about 0.25% ABV.

BamaRooster · 02-09-2012, 03:00 PM

Quote:

Originally Posted by unionrdr

Well,from what I've seen al the different ABV formulas have numbers ranging from .2-.5 % depending on which you use to calculate ABV. There was a thread on this some time last year. Try a search.

Looks like this advise is spot on!

ikafka · 02-09-2012, 05:32 PM

Thanks

Robms88 · 02-09-2012, 06:00 PM

According to a website I saw, gravity is measured in points per pound per gallon.

For dextrose, I THINK it was about 43 points. That means when 1 pound (454g) is dissolved in 1 gallon, it yields a gravity of 1.043.

If you made this 5 gallons, it would be 43/5 = 8.6. That means topping up another 4 gallons to make it 5 gallons would yield only 1.008.

If you prime at, say, 4.54 grams (to make it easy) per 500ml bottle, it means you would need 4.54 grams x 46 bottles to make 20884 grams (209)

Robms88 · 02-09-2012, 06:02 PM

Sorry, 209 grams.

209 is, for sake of argument, about half of 454 grams (1 pound). This means it will add about 1.004 to a batch of beer. 1.004 down to 1.000 (water) makes 0.5% alcohol. Therefore, it adds 0.5%.

**unionrdr** · 02-09-2012, 06:15 PM

I always took the Cooper's formula (OG-FG)/7.46+.5=ABV% to mean .5% for the whole batch. I've used 4.1oz of destrose to get 2.0 volumes of co2 in a 23L (6.072 USG) batch of ale. Worked fine for mu Burton ale.