Vapor Pressure of Liquid Bismuth

Abstract

The vapor pressure of liquid bismuth in the temperature range 800°—1050°K has been measured by the torsion-effusion method. The values obtained are represented by the equation: log10p (mm Hg) = 8.579— (10 108/T). A few separate Knudsen measurements have been performed in the same temperature range and the results used to calculate the molecular weight of bismuth vapor, and thus the heat of dissociation for the reaction ½ Bi2→Bi.