On Tuesday 19 June 2007 23:42, Harry Wyeth wrote: > We read a lot about xxx tons of CO2 or whatever, but I have trouble imaging > the weight of a volume of a gas. I have read that water is about 800 times > denser than air, so from that one could calculate the weight of a cubic > meter of air, for example. But how about other gases? Is there a metric > rule of thumb? Why do engineers measure the output of a gas by weight in > the first place?
One mole at STP is 22 liters. (It's 22.4 for helium, which is the closest gas to ideal, AFAIK.) CO2 is 44 daltons, so 2 g/l. So a ton of CO2 is half a megaliter. CO2 is far from the ideal gas, though. Pierre
