Abstract
The enthalpy of formation of Cd 0.5Te 0.5(s) has been determined using a Calvet calorimeter at 785 K by direct reaction calorimetry. The heat changes were measured for the additions of Cd(s) or Te(s) from 298 K to a reaction crucible containing the other liquid metal at 785 K. Measurements were also carried out to determine the enthalpy changes due to the direct reaction of the Te(l) and Cd(l) at 785 K. The enthalpies of formation of Cd 0.5Te 0.5 calculated from the two sets of experiments were in agreement. The H T° H 298° values of the Cd 0.5Te 0.5 compound have also been determined in the temperature range 406–826 K by the drop method. Using ΔH fm° at 785 K and H T H 298° values of Cd 0.5Te 0.5, ΔH fm° at 298 K was determined to be −(50.349±0.510) kJ mol −1.
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