|Author||Panish, M. B. ♦ Reif, L.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||CHEMISTRY ♦ BOILING ♦ EVAPORATION ♦ IRIDIUM ♦ KNUDSEN EFFUSION ♦ PRESSURE ♦ RHODIUM ♦ TEMPERATURE ♦ VAPORS|
|Abstract||The vaporization of iridium and rhodium was studied by Knudsen effusion and Langinuir evaporation techniques. The vapor pressure of iridium over the temperature range of 2100 to 2600 deg K is represented by the equation: logn/sub m//sub m/ = the temperature range of 2050 to 2200 deg K by the equation: logp/sub m//sub m/ = 0.28--(28300/T). Third-law analyses of the data yield the following heats of vaporization: iridium' DELTA H/sub 2//sub 9//sub 8/ = 158.4 plus or minus 0.5 kcal/mole; rhodium, DELTA H/sub 2//sub 9//sub 8/ = 132.8 plus or minus 0.3 kcal/ mole. Estimated boiling points for iridium and rhodium are 4800 deg and 3980 deg K, respectively. (auth)|
|Learning Resource Type||Article|
|Publisher Department||Avco Corp., Wilmington, Mass.|
|Journal||Journal of Chemical Physics|
|Organization||Avco Corp., Wilmington, Mass.|
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