Gas constant R depends on the chemical characteristics of the ideal gas. This dependence is obviated if matters are expressed as a function of the kilomol. The term kmol is used for a quantity of mkg of a gas which has the same volume content V for all gases. At 0°C and 760 Torr, this is molvolume v0 = 22.414 m3/kmol The density of air at 0°C is 1.293 kg/m3. For air, expressing p in kg/m3, this leads to gas constant RL = 29.27 mkg/kg °K If one refers the equation from formula 2.3.2.2 to 1 kmol, i.e. to mkg of a gas, the equation reads:
Formula 2.3.3.1
As, at constant pressure and constant temperature, the mol volume v0 for all ideal gases is the same, the multiplication of m x R must also have the same value for all gases. This expression is described as general gas constant R0 = m x R and, expressed in figure1, (101325 x 22,414 / 273.15), leading to a universal constant of physics = 848 mkg/kmol°K
