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Alcohol has a lower density then water (Ethanol - p = 0.789 kg/m3 @ 20oC, water - p = 1.000kg/m3 @ 4oC) and hence will reduce the density of water and will have a SG (specific gravity) reading below 1. On the other hand sugar has a higher density than water and like most dissolved solids will raise the water's density.
The theoretical yield of alcohol from sugar due to alcoholic fermentation (glucose is converted by yeast to ethanol and carbon dioxide) is 51.1% by weight (65 %/volume). However, with these considerations it is closer to 47% by weight (59 %/volume).
If you use a 12% yeast, count on 12% alcohol. If you use a 12% yeast, and the amount of sugar listed for 12%, you will get a DRY finished product. Use the following tables to help guide you in the amount of initial sugars and types of yeasts you use.
1 wrz 2018 · Specific Gravity / Density Conversions . The specific gravity (SG) conversions are intended to convert between different hydrometer reading scales. The conversions to Brix, Oechsle, KMW, g/L sugar, and potential alcohol are only valid prior to fermentation.
Potential alcohol is calculated as discussed in the alcohol predicition section, with the assumption of a final gravity of 1.000, and a correction for DSOS of 0.007. Grams per litre of dissolved solids is calculated from the specific gravity, and the °Brix.
25 lis 2010 · Since specific gravity is the ratio between the density (mass per unit volume) of an actual gas and the density of air - specific gravity has no dimension. The density of air at NTP is 1.205 kg/m 3 .
Specific gravity of various materials, gasses and liquids. Specific gravity is a measure of the relative density of a substance as compared to the density of water at a standard temperature.
