146 



Table 1 00 

 COMPRESSIBILITY OF GASES 



TABLE 100. — Some Physical Properties of Compressed Nitrogen 



(Abridged from Deming, Shupe, Phys. Rev., 37, 639. 1931; based on data by Bartlett and collaborators, 

 Journ. Amer. Chem. Soc, 1927-31.) 



Tables published by Bartlett et al show compressibility factors pv/(pv), at the different pressures and tem- 

 peratures. The denominator (pv), is the value of pv at S.T.P. In order to find the specific volume of the gas it 

 is required to know the volume of 1 g at S.T.P. Birge gives 22414.1 cc as the volume of a mole of an ideal gas 

 at S.T.P. 



pv/(pv), at 1 atm. is close to 1/1. 00046. The gas used by Bartlett contained 0.9993 nitrogen and 0.0007 inert 

 gas, presumably argon; the apparent molecular weight is therefore taken as 28.025. The volume adopted for 

 1 g at S.T.P. is 22414.1/1. 00046 X 28.025 = 799.42 cc, and the value of R Tat o° is 22414.1/28. 025 =799.79 

 cc atm./g. When one of Bartlett's compressibility factors is divided by the pressure and multiplied by 799.42 

 the result is the volume in cc of 1 g of the gas at the given temperature and pressure. 



For fugaci ties, see Lewis and Randall, Thermodynamics, 1923. 



Smithsonian Tables 



