Heat Capacity and Thermodynamic Properties of Triuranium Silicide from 1 to 1203 K

Author

Howard E. Flotow
Darrell W. Osborne
William G. Lyon
Fernande Grandjean, Missouri University of Science and TechnologyFollow
Donald R. Fredrickson
Ian J. Hastings

Abstract

The heat capacity of triuranium silicide, U₃Si, has been measured from 1 to 350 K and its enthalpy determined from 298 to 1160 K. The coefficient γ for the heat capacity contribution of the conduction electrons (γT) is (39.3 ± 0.4) mJ K^-2 mol^-1. Thermodynamic functions are tabulated at selected temperatures between 1 and 1203 K. At 298.15 K, the values determined for the heat capacity C_p ^o, the entropy S^o, the enthalpy {H^o(298.15 K) - H^o(0)}, and the function {G^o(298.15 K) - H^o(0)} 298.15K are (107.90 ± 0.43) J K^-1 mol^-1, (174.02 ± 0.70) J K^-1 mol^-1, (23297 ± 93) J mol^-1, and -(95.88 ± 0.38) J K^-1 mol^-1, respectively. The standard Gibbs energy of formation ΔG_f ^o(U₃Si, c, 298.15 K) = -(105.6 ± 19.2) kJ mol^-1 was derived.

Recommended Citation

H. E. Flotow et al., "Heat Capacity and Thermodynamic Properties of Triuranium Silicide from 1 to 1203 K," Journal of Chemical Thermodynamics, vol. 9, no. 5, pp. 473 - 481, Elsevier, May 1977.

The definitive version is available at https://doi.org/10.1016/0021-9614(77)90148-3

Department(s)

Chemistry

International Standard Serial Number (ISSN)

0021-9614

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1977 Elsevier, All rights reserved.

Publication Date

01 May 1977