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Activities of Thallium and Lead in Liquid Gold Base Binary Alloy Systems
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1976
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Lead ConversionEngineeringExperimental ThermodynamicsChemistryMineral ProcessingMolecular ThermodynamicsCorrosionThermodynamicsEquilibrium Thermodynamic PropertyTemperature.the ActivitiesThermoanalytical MethodMaterials EngineeringMaterials ScienceLiquid Au-tlPhysical ChemistryHeat TransferCrystallographyMicrostructurePhase EquilibriumAu-pb SystemsAlloy PhaseMetallurgical SystemChemical KineticsThermophysical Property
The values of E.M.F. of liquid Au-Tl and Au-Pb systems were measured in the temperature ranges from 700 to 800°C and 700 to 950°C respectively, by using galvanic cells composed of(This article is not displayable. Please see full text pdf.) noindent and(This article is not displayable. Please see full text pdf.) \ oindentrespectively. The values of E.M.F. obtained in both systems showed good stability and linear relationship with temperature.The activities of both components in these systems demonstrate moderate negative deviation from Raoult’s law over the whole concentration range.The maximum values of the heat of mixing are −0.06 kcal/mol for the Au-Tl system at NTl=0.60 and −0.21 kcal/mol for the Au-Pb system at NPb=0.59. The small temperature dependencies of the activities in these systems correspond to these small values of the heat of mixing.In addition, some other thermodynamic functions were derived from the results obtained.