ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Measurement of the Gibbs energy of formation of URh3 using an oxide solid electrolyte

Jacob, Thomas K and Chandrasekharaiah, Mallasetty S (1990) Measurement of the Gibbs energy of formation of URh3 using an oxide solid electrolyte. In: Zeitschrift für Metallkunde, 81 (7). pp. 509-512.

[img] PDF
167._Gibbs_energy_URh3._Z_Metallkund._1990.pdf - Published Version
Restricted to Registered users only

Download (237kB) | Request a copy

Abstract

The Gibbs' energy offormation of the intermetallic compound URh3has been measured in the temperature range 980 to 1320 K using an oxide solid state cell incorporating yttria-doped thoria as the solid electrolyte and a mixture of manganese and manganese oxide as the reference electrode. The cell can be represented as Pt, Mn + MnO I (Y203)Th02 I Rh + URh3 + U02 + x' Rh, Pt The reversible emf of the cell was a linear function of temperature E = 15.60 +0.0237 T (±0.8) mY. Using auxiliary thermodynamic data for MnO and U02+ x the Gibbs' energy of formation of URh3 from component metals has been computed. The results can be expressed by the equation L'.G?< URh3 > = -316240 + 13.22 T (± 3000) J mol-1. The "third-law" enthalpy of formation of URh3at 298 K is -293.2 (± 4) kJ mol-1, significantly more negative than the value of -181.5 kJ mol-1 calculated using Miedema's model.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Carl Hanser Verlag.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Ms V Mangala
Date Deposited: 09 Dec 2011 10:22
Last Modified: 09 Dec 2011 10:22
URI: http://eprints.iisc.ac.in/id/eprint/42666

Actions (login required)

View Item View Item