首页|Thermodynamic properties over < UAI(2)(cr)+U(cr)> two phase region of U-Al system: Knudsen Effusion Mass Spectrometric study
Thermodynamic properties over < UAI(2)(cr)+U(cr)> two phase region of U-Al system: Knudsen Effusion Mass Spectrometric study
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NSTL
Elsevier
High temperature vaporisation thermodynamic studies over < UAl2(cr) + U(cr)> two-phase region of U-Al system were carried out by employing Knudsen Effusion Mass Spectrometry (also known as High Temperature Mass Spectrometry) in the temperature range of 1146-1327 K. The vaporisation reaction occurs incongruently and Al(g) was the neutral vapour species observed in the equilibrium vapour. Partial pressure-temperature relation of Al(g) was derived as log(p(Al)/Pa) = ( -19809 +/- 209)/T + (12.58 +/- 0.17). Using the p ?T relation, delta H-r(298. 15)& nbsp; of the following reaction: UAl2(cr) = 2Al(g) + U(cr) was evaluated by second and third law methods. Subsequently, enthalpy and Gibbs energy of formation of UAl2(cr) were deduced as delta fH298.15 & nbsp; & nbsp;= -89.9 +/- 24.1 kJ mol (-1) and delta fG(298.15)& nbsp; = -89.9 + 24.1 kJ mol(-1), respectively. The vaporisation studies on this two phase region are being reported for the first time. (c) 2022 Elsevier B.V. All rights reserved.
< UAI(2)(cr)+U(cr)& nbsp>& nbsptwo phase region & nbspU-Al systemKnudsen Effusion Mass SpectrometryPressure-temperature relationEnthalpyGibbs energyENTHALPIESURANIUM
Rao, C. V. S. Brahmananda、Narasimhan, T. S. Lakshmi、Trinadh, V. V.、Manikandan, P.、Bera, Suranjan
NSTL
Elsevier
