Physico-Chemical Properties of Major Gases

The general designation (i.e., chemical name, CAS registry number, UN number), the relative atomic and molar mass, the physical properties (i.e., density, viscosity), thermal properties (i.e., molar heat capacities, latent enthalpies, and thermal conductivity), optical properties (e.g., refractive index), along with properties important for health and safety (i.e., flammability limits, ignition temperature, toxicity) of some important gases are reported in Tables 19.15-19.17. 

Name (synonyms) CAS Reg. No. [CARN] H iupXc chemical formula Rel. molar mass ( C=12) Melting temperature Boiling temperature Eusion (AH,) Vaporization (AH,) Density 273K Specific gravity vs. air Dynamic viscosity (300K) 

Name (synonyms) Isobar molar heat capacity (300K) Isochor molar heat capacity (300K) Isentropic exponent (300K) Thermal conduct ivity (298K) Attraction constant Co-volume Critical pressure Critical tempera- ture Critical density Critical compress. factor Solubility water (0°C) Refractive index (589nm) 

Note (2) 2003 TLVs and BEIs. - ACGIH Worldwide, Cincinnati, OH. 

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