Not nearly that much, H-ost. I did a rough calculation for my normal 10lb in 5 gallon batch, 1060 something.
10lb of grain is about 4.5kg. At 62% sugar, thatís 2.8 kg. Divided by 342g/mole, thatís 8.2 moles. Figure a 20L batch, thatís .4 moles/liter. At .51Cļ/m thatís .2Cļ, or a little less than .4Fļ
If somebody has a better take on the chemistry, go for it. Just donít make me remind you about significant figures.
Yíall have fun with those big batches, itís all I can do to lift five gallons in a carboy.