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FREE ENERGY OF MIXING OF THE BINARY LIQUID ALLOYS OF POTASSIUM


L. P. Jaiswal1 , S. K. Chakrabarti2
Page No. 230-235


Abstract

There are a large number of binary liquid alloys which exhibit interesting behaviour as a function
of concentration as regards the thermodynamic and electrical properties. The thermodynamic
properties of mixing, especially in case of complex forming alloys, are not symmetrical about the
equi-atomic composition—deviating considerably from that of an ideal alloy. Here we have
considered two such molten alloys of potassium—potassium-lead and potassium amalgam—and
tried to calculate their free energy of mixing at different concentrations of the ingredients by using
Flory’s model. It is a statistical mechanical model based on the size factor of the constituent species
of binary alloys. Our results explain the observed asymmetry in the free energy of mixing of the said
binary liquid alloys around equi-atomic composition.
Key words: Binary liquid alloy, Free energy of mixing, Interchange energy, Activity, Flory’s model.


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