Thermodynamics of liquid Sn-Pb alloys determined by vapour pressure measurements

Application of Knudsen method in the studies of liquid Sn-Pb alloys, containing from 4.85 to 95.31 mol% of lead, in temperatures from 851 to 1186 K, and liquid tin and lead, in temperatures 1360 - 1442 and 934 - 1149 K, respectively, provided experimental data which made characterization of thermodynamic properties of liquid phase of Sn-Pb system possible. Parameters of the Redlich-Kister equation, describing excess Gibbs energy of liquid phase of the examined system, were determined. With application of the third law method standard enthalpies of sublimation of tin and lead were calculated.