Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
675428 | Thermochimica Acta | 2007 | 6 Pages |
Abstract
The enthalpies of mixing of the gold–lead and silver–gold–lead alloys were determined at 973 K by using a high temperature Calvet calorimeter (400 K < T < 1400 K). The mixing enthalpies of Au–Pb liquid are negative over the entire composition range with a minimum ΔmixHm = −1074 J mol−1 at XAu = 0.40. The enthalpies of formation of ternary liquid alloys have been carried out along the following sections: XAg/XPb = 1/4, XAu/XPb = 1/4 and 2/3 at 973 K. Experimental values of ΔmixHm = f(XAg, XAu) are compared with those predicted from the Kohler, Muggianu and Toop relations. An assessment including the excess ternary parameter is presented.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
S. Hassam, A. Gheribi,