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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/3571

Title: Electrochemical study on determination of diffusivity, activity and solubility of oxygen in liquid bismuth
Authors: GANESAN, R
GNANASEKARAN, T
SRINIVASA, RS
Keywords: wide temperature-range
gibbs free-energy
system
antimony
bi
Issue Date: 2006
Publisher: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
Citation: JOURNAL OF CHEMICAL THERMODYNAMICS, 38(6), 739-747
Abstract: Diffusivity of oxygen in liquid bismuth was measured by potentiostatic method and is given by lg(D-o(Bi)/cm(2) . s(-1))(+/- 0.042) = -3.706 - 1377/(T K-1) (804 < T/K < 1090). Activity of oxygen in bismuth was determined by coulometric titrations and using the measured data standard free energy of dissolution of oxygen in liquid bismuth was derived for the reaction: 1/2O(2) (g) = [O](Bi) (at.%) and is given by Delta G(O(Bi))(o)/(J . g-atom O-1)(+/- 720) = -108784 + 20.356T K-1 (753 < T/K < 1020). Using the above data and Gibbs free energy of formation of Bi2O3 (s), solubility of oxygen in liquid bismuth was derived as a function of temperature and is given by the following expressions: lg(S/at%O)(+/- 0.05) = -4476/T K-1 +4.05 (753 < T/K < 988); lg(S/at.%O)(+/-0.04) -3786/T K-1 + 3.36 (988 < T/K < 1020). The present data on solubility of oxygen in liquid bismuth is compared with the literature data. (C) 2005
URI: http://dx.doi.org/10.1016/j.jct.2005.08.006
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3571
http://hdl.handle.net/10054/3571
ISSN: 0021-9614
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