Abstract
The activity of the liquid Te-In system has been determined by the emf measurement of the following galvanic cell:
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The activity of indium in liquid Te-In allays at 1000 K and 1050 K shows large negative deviations from Raoult’s law in the tellurium-rich region and remarkable negative to positive deviations from ideality in the indium-rich region. The activity of tellurium at the same temperatures exhibits negative deviations from Raoult’s law over the whole concentration range. The α functions of indium in the alloys show curves against NIn, suggesting the absence of the behavior of a regular solution.
The free energy of mixing at 1050 K has large negative values compared with ΔGid, and the peak value of ΔG shows −27.0 kJ/mol at about NIn=0.55. Heat of mixing shows very large negative values. The peak value of ΔH is −20.6 kJ/mol at about NIn=0.49.
