Abstract
Using the single adiabatic wall calorimeter, heats of mixing in the binary liquid alloys of copper and silver, gold, aluminum, gallium, indium, germanium or tin, and also in the binary alloys of gold and silver, aluminum, gallium, indium, germanium or tin were determined at 1100°C.
The experimental method and procedure available for reducing the influence of the thermal leakage out of the calorimeter were described, and the availability was confirmed through the experiments with an improved calorimeter with double adiabatic walls.
The main results obtained are as follows:
(1) The thermal leakage out of the calorimeter can be reduced considerably by reforming the single adiabatic wall calorimeter to the type of double adiabatic walls. (2) Some systematic correlations were found between heats of mixing and positions of the considered couples in the periodic table. (3) The behavior of heats of mixing can be explained qualitatively in terms of the electronegativity and size factors. Each factor is closely related to the periodic table.
