Table 250 271 



CRITICAL TEMPERATURES, PRESSURES, AND DENSITIES OF GASES 



Substance 



Ref. 



Acetylene 36 



Air — 140.7 



Alcohol (C 2 H 6 0) 243.1 



Alcohol (CH4O) 240.0 



Allylene 128 



Ammonia 132.4 



Argon — 122 



Benzene 288.5 



Bromine 302 



iso-Butane 134 



n-Butane 153 



Carbon dioxide 31.1 



Carbon disulphide 273 



Carbon monoxide — 139 



Chlorine 144.0 



Chloroform 263 



Cyanogen 128 



Ethane 32.1 



Ether (ethyl) 193.8 



Ethyl chloride 187.2 



Ethylene 9.7 



Helium —267.9 



Hydrogen —239.9 



Hydrogen bromide 90 



Hydrogen chloride 51.4 



Hydrogen iodide 151 



Hydrogen sulphide 100.4 



Krypton — 63? 



Methane - 82.5 



Methyl chloride 143. 1 



Neon — 228.7 



Nitric oxide — 94? 



Nitrogen — 147.1 



Nitrous oxide 36.5 



Oxygen — 1 18.8 



Phosgene 182 



Propane 95.6 



Propylene 92.3 



Sulphur dioxide 157-4 



Water 374-0 



Xenon 16.6 



(a) "Plait point." 



(b) "Critical point of contact." 



i. Pickering, Bur. Standards Sci. Paper No. 541, 

 1926. 



2. Lowry and Erickson, Journ. Amer. Chem. Soc, 



49, 2729. 1927. 



3. Mathias, Crommelin, and Watts, Compt. Rend., 



185, 1240, 1927. 



4. Cardoso and Fiorentino, Journ. Chim. Phys., 23, 



841, 1926. 



5. Cardoso and Sorrentino, Journ. Chim. Phys., 24, 



77, 1927. 



(Table prepared by Gas Chemistry Section, Bur. Standards, Feb. 19, 1929.) 



Smithsonian Tables 



6. Ramsay and Young, Trans. Philos. Soc, London, 



177, 123, 1887. 



7. Young, Journ. Chem. Soc, 50. 903. 1891. 



8. Ramsay and Young, Trans. Philos. Soc, London, 



178, 313, 1888. 



9. International Critical Tables, 3. 248, 1928. 



10. Ramsay and Young, Trans. Philos. Soc, London, 

 178, 57, 1888. 



11. Young, Proc Roy. Soc. Dublin, 12, 374, 1910. 



