Standard molar enthalpy of formation of FeGe(s) and FeGe2(s) intermetallic compounds

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Publication Details

Output type: Journal article

Author list: Phapale S, Mishra R, Chattaraj D, Samui P, Sengupta P, Mishra PK

Publisher: Elsevier

Publication year: 2014

Journal: Journal of Alloys and Compounds (0925-8388)

Volume number: 591

Start page: 170

End page: 173

Number of pages: 4

ISSN: 0925-8388

eISSN: 1873-4669

Languages: English-Great Britain (EN-GB)

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Open access status: closed

Abstract

Thermodynamics plays an important role in predicting long term stability of the materials under different reactive conditions. The present paper describes determination of standard molar enthalpies of formation of FeGe(s) and FeGe2(s) compounds employing a high temperature solution calorimeter. The reaction enthalpies of Fe(s), Ge(s), FeGe(s) and FeGe2(s) in liquid Sn at 986 K were measured using a Calvet calorimeter. The standard molar enthalpy of formation of the compounds at 298 K (Delta fH degrees(298)) were calculated using the measured reaction enthalpy data. The values of Delta fH degrees(298) of FeGe(s) and FeGe2(s) at 298 K were found to -15.56 +/- 0.92 and -36.89 +/- 1.17 kJ mol (1), respectively. The standard molar enthalpy of formation of FeGe(s) and FeGe2(s) at 298 K obtained experimentally has been compared with the calculated values derived using Vienna ab initio simulation package (VASP). (C) 2013 Elsevier B.V. All rights reserved.

Keywords

Calorimetry, Enthalpy of formation, Iron germanium alloy

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