Regarding the calculation of dry gas density?
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According to the density formula ρ = m/V, and also using the mole formula n = m/M = v/Vm, we get ρ = M/Vm. The unit of M is g/mol, while the unit of Vm is L/mol; thus the unit of density that results from this conversion is g/L. 1 g/L equals 1 Kg/m3. Is this calculation correct? Please give some expert advice!
This post was last edited by ylb913 on 2016-7-20 at 14:07. Dividing the molar volume by 22.4 gives the density of the gas under standard conditions, with the unit being kg/Nm3. It is not its density under actual operating conditions.
Well, it is calculated under standard conditions – is this the correct way to do it? Also, according to the formula density = m/v, the units can be either g/cm3 or Kg/m3, while according to the formula M/Vm, the unit is g/L; these two units are not consistent with each other Please explain!
The common units for specific gravity and density are either g/cm3 or Kg/m3; the difference between the two is 1000 times. In terms of M/Vm, this unit of g/L is equivalent to the standard unit for density, Kg/m3; by understanding and remembering this, the need to convert units is eliminated. ——My common way of understanding it is to use kilomoles corresponding to kilograms and cubic meters. Equivalent to grams and liters per mole.