Abstract
The activities of bismuth (in the range 0.0021 < XBi< 0.0053) and oxygen (in the range 3 X 10−4 < Xo < 0.044) in liquid copper at 1300 ° have been measured by equilibrating pure copper specimens with gaseous atmospheres of known oxygen potential and partial pressure of bismuth. The value of γ Bi o in liquid copper at 1300 ° was obtained as 3.09 and the variation of γBi with mole fraction of oxygen was obtained as log γBi = −0.91Xo + 0.49, which yields ɛ O Bi = −2.1. The observed variation of log γo with mole fraction of bismuth is widely scattered but is in fair agreement with the thermodynamically-consistent expression, log γo = −0.9LYBi − 0.51.
Published Version
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