Table 111. 

 DENSITY OF CASES. 



127 



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

 at 0° C, 76 cm pressure and standard gravity, 980.665 cm/sec^, (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 m 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 data are derived from advance 

 sheets of "A Review of the Densities of Various Gases," to be published by the U. S. Bureau of 

 Standards, 



Gas 



Acetylene 



Air 



Ammonia 



Argon 



Carbon dioxide 



Carbon monoxide 



Chlorine 



Ethane 



Ethylene 



Fluorine 



Helium 



Hydrogen 



Hydrogen bromide. . . . 

 Hydrogen chloride. . . . 

 Hydrogen sulphide .... 



Krypton 



Methane 



Methyl chloride 



Methyl ether 



Methyl fluoride 



Neon 



Nitric oxide 



Nitrogen 



Nitrogen, atmospheric, 



Nitrous oxide 



Oxygen 



Phosphine 



Propane 



Silicon tetrachloride. . . 



Sulphur dioxide 



Xenon 



Formula 



C2H2 

 NH3 



A 



CO2 



CO 



CI2 



C2H4 

 Fo 



He 



H2 



HBr 



HCl 



H2S 



Kr 



CH4 



(CH3)C1 



(CH3)0 



(CH3)F 



Ne 



NO 



N2 



NoO 



O2 



PH3 



CaHg 



SiF4 

 SO2 

 X 



Weight in 



grams. 



Normal 



liter 



I.1791 



1.2929 



0.7708 



1.7824 



1.9768 



1.2504 



3-214 



1-3565 



1 . 2603 



1.695 



0.178s 



0.08987 



3-6443 

 1.6392 



I-S392 



3.708 



0.7168 



2.3045 

 2.1096 



1-5454 

 0.9002 

 1.3402 

 1.2506 

 1.2568 

 1.9777 

 1.4290 



1-5293 

 2.0200 

 4.6840 

 2.9267 

 S-851 



Specific gravity 



Air = i 



0.9120 



I. 



0.5962 



1.3786 



1.5290 



0.9671 



2.4859 



1.0492 



0.9748 



1-313 



O.1381 



0.06951 



2.8188 



1.2679 



1. 1905 

 2.867 



0.5545 

 1.7824 



1.6317 

 1-1953 

 0.6962 

 1.0366 

 0.9673 

 0.9721 

 1-5297 

 I -1053 

 I. 1828 

 1.5624 

 3.6229 

 2.2636 

 4-514 



0.,= i 



0.8251 

 0.9048 

 0-5394 

 1-2473 

 1-3834 

 0.8750 



2.249 



0.9493 



0.8S20 



1. 186 



0.1249 



0.06285 



2.5503 



1.1471 



1.0771 



2-595 

 0.5016 

 1. 6127 



1-4763 

 1.0815 

 0.6300 



0.9379 

 0.8752 

 0.8795 

 1.3840 

 1. 0000 

 1.0702 

 1.4136 

 3.2779 

 2.0481 

 4.094 



Pounds per 

 cubic foot 



0.07361 



0.08072 



0.04812 



O.II127 



O.12341 



0.07806 



0.2006 



0.08468 



0.07868 



0.1058 



O.OII14 



0.005610 



0.22751 



0.10233 



0.09609 



0.2315 



0.0447s 



0.14387 



0.13 1 70 



0.09648 



0.05620 



0.08367 



0.07807 



0.07846 



0.12347 



0.08921 



0.09547 



O.12611 



0.29242 



O.18271 



0.3653 



3 

 4 



5 

 6 



7 

 I 

 8 



9 

 10 

 II 



12 

 13 

 14 

 15 

 14 

 16 

 16 



17 

 18 



19 

 20 



2 

 5 



23 

 24 

 15 



(i) Stahrfoss; (2) average; (3) Guye; (4) Ramsay, Leduc; (5) Guye, Puitza; (6) Raj'leigh; (7) 

 Jaquerod, Tourapian; (8) Batuecas; (9) Moissan; (10) Taylor; (11) Morley; (12) Moles, Reemair; 

 (13) Gray, Burt; (14) Baume, Perrot; (15) Moore; (16) Baume; (17) Batuecas, Moles; (18) Wat- 

 son; (19) Gray, Guye, Davila; (20) Gray, Moles; (21) Ter Gazarian; (22) Timmeraus; (23) Ger- 

 mann. Booth; (24) Scheuer. 



The weight of the normal liter of the following gases has been determined with less accuracy: 

 Arsine, 3.484, Dumas; Carbon oxysulpfiide, 2.7208, Von Than; Bulane, 2.504, Frankland; Cyano- 

 gen, 2.33s, Gay-Lussac; Hydrogen fluoride, 0.9212, Thorpe, Hambly; Hydrogen iodide, 5.657, 

 Thomson; Hydrogen sclcnidc, 3.6702, Bruylante; Hydrogen telluride, 5.805, Ernyei; Methylamine, 

 1.396, Leduc; Nilrosyl chloride, 2.9919, Wourtzel. 



Smithsonian Tables. 



