Thermodynamic study of the sublimation of crystalline tris(1,1,1-trifluoro-2,4-pentanedionate)ruthenium(III) and tris(1,1,1,5,5,5-hexafluoro-2,4-pentanedionate)ruthenium(III)

• Tipo: Artigo em Revista Científica Internacional
• Data: 2001

Autores

da Silva, MAVR (Autor) FCUP; Monte, MJS (Autor) FCUP; Giera, E (Autor) Outra

Revista

Título: Journal of Chemical Thermodynamics

Vol. 33

Páginas: 369-376

ISSN: 0021-9614

Editora: Elsevier

Indexação

ISI Web of Knowledge - 7 Citações

Scopus - 7 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia mecânica

Outras Informações

ID Authenticus: P-000-VZ7

DOI: 10.1006/jcht.2000.0734

Abstract (EN): The Knudsen mass-loss effusion technique was used to measure the vapour pressures at different temperatures of two crystalline ruthenium complexes: tris(1,1,1-trifluoro-2,4-pentanedionate)ruthenium(III) {Ru(tfacac)(3)}, between T = 350.20 K and T = 369.17 K and tris(1,1,1,5,5,5-hexafluoro-2,4-pentanedionate)ruthenium(III) {Ru(hfacac)(3)} between T = 299.15 K and T = 313.14 K. From the temperature dependence of the vapour pressure of the crystalline compounds, the standard molar enthalpies of sublimation were derived by the Clausius-Clapeyron equation and the molar entropies of sublimation at equilibrium pressures were calculated. By using an estimated value for the heat capacity differences between the gas and the crystal phases the standard, p(o) = 10(5) Pa, molar enthalpies, entropies, and Gibbs energies of sublimation at T = 298.15 K, were derived: [GRAPHICS] (C) 2001 Academic Press.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8