176 



Table 1 27 

 DENSITY OF GASES 



The following table gives the density as the weight in grams of a liter (normal liter) of 

 the gas at o°C, 76 cm pressure, and standard gravity, 980.665 cm/sec. 2 , (sea-level, 45 

 latitude), the specific gravity referred to dry, carbon-dioxide-free air, and to pure oxygen, 

 and the weight in pounds per cubic foot. Dry, carbon-dioxide-free air is of remarkably 

 uniform density; Guye, Kovacs and Wourtzel found maximum variations in the density of 

 only 7 to 8 parts in 10,000. For highest accuracy pure oxygen should be used as the standard 

 gas for specific gravities. Observed densities are closely proportional to the molecular 

 weights. The following table was prepared by the Gas Chemistry Section, Bur. Standards, 

 1929. 



Formula 



Weight 

 of 



normal 

 liter in 



grams 



O2 



Pounds 



per 

 cubic 

 foot 



Air 1.2929 



Acetylene C 2 H 2 1.173 



Ammonia NH 3 -77io 



Argon A 1.7837 



Arsine AsH 3 3.48 



Butane-iso C4H10 2.673 



Butane-n ^ H » {at yioSm 



Carbon dioxide C0 2 1 9769 



Carbon monoxide CO 1.2504 



Carbon oxysulphide COS 2.72 



Chlorine Cl 2 3.214 



Chlorine monoxide C1 2 3.89 



Ethane C 2 H 6 1.3566 



Ethylene C 2 H 4 1.2604 



Fluorine F 2 1.696 



Helium He .17847 



Hydrogen H 2 .08988 



Hydrogen bromide HBr 3-6445 



Hydrogen chloride HC1 1.6392 



Hydrogen iodide HI 5-789i 



Hydrogen selenide H 2 Se 3670 



Hydrogen sulphide H 2 S 1-539 



Krypton Kr 3.703 



Methane CH 4 .716s 



Monomethylamine CH 3 NH 2 1.396 



Methyl chloride CH 3 C1 2.3076 



Methyl ether (CH 3 ) 2 2.1098 



Methyl fluoride CH 3 F 1-5452 



Neon Ne .90035 



Nitric oxide NO 1.3402 



Nitrogen (chem) N 2 1.25055 



Nitrogen (atm) 1.2568 



Nitrosyl chloride NOC1 2.992 



Nitrous oxide N 2 i-977s 



Oxygen 2 1.42904 



Phosphine PH 3 1.5294 



Propane C 3 H 8 2.020 



Silicon tetrafluoride SiF 4 4.684 



Sulphur dioxide S0 2 2.9269 



Xenon X 5.851 



1 .0000 

 .907 



•5963 

 1.3796 

 2.69 

 2.067 



2.0854* 



1.5290 

 .9671 



2.10 



2.486 



3.01 



1 -0493 

 •9749 



I-3I2 

 .13804 

 .06952 



2.8189 



1.2678 



4-477e 

 2.839 

 1. 190 

 2.86 8 

 •5544 

 1.080 

 1.7848 

 1.6318 



II95I 

 •6963s 



1.0366 

 .96724 

 .9721 



2.314 



1-529? 



1. 10527 



1. 1 829 



1.562 



3-623 



2.2638 



4-525 



•9047 

 .8208 



•5395 

 1.2482 

 2.44 

 1.870 



I.3834 

 .8750 

 1.90 

 2.249 

 2.72 



•9493 

 .8820 

 1. 187 

 .12489 

 .06290 



2.5503 

 1.1471 

 4.0510 

 2.568 

 1.077 

 2-596 

 •50i6 

 •9769 

 1.6148 

 1.4764 

 1.0813 

 .63004 

 •9378 

 •87510 

 •8795 

 2.094 



1-3840 



1. 0000 



i.070 2 



1.414 



3-278 



2.0482 



4094 



.08071 



•07323 



•04813 



•III35 



.217 



.1669 



•15726* 



.12341 

 .07806 

 .170 

 .2006 



•243 



.08469 



.07868 



•1059 



.011142 



.005611 



•22752 



.10233 



.36140 



.229 



.09608 



.23 1 5 



.04475 



.08715 



.14406 



.13171 



.09646 



.056207 



.08367 



.078069 



.07846 



.1868 



.12347 

 .089212 



•09548 



.1261 



.2924 



.18272 



•3653 



,6 



* Both butane and air at 710 mm. 



1. Based on densities in I. C. T., 3, 3. 1928. 



2. Baxter and Starkweather, Proc. Nat. Acad. Sci.. 14, 57. 1928. 



3. Baxter and Starkweather, Proc. Nat. Acad. Sci., 14. so, 1928. 



4. Moles and Clavera, Z. Anorg. Allgem. Chem., 167, 49, 1927- 

 5- Bogaert, Bull. Soc. Chim. Belg., 36, 384, 1927- 



6. Beckers, Bull. Soc. Chim. Belg., 36, 559, 1927. 



Smithsonian Tables 



