Enthalpies of combustion, vapour pressures, and enthalpies of sublimation of the 1,5-and 1,8-diaminonaphthalenes

• Tipo: Artigo em Revista Científica Internacional
• Data: 2010

Autores

da Silva, MAVR (Autor) FCUP; Ana I M C L Lobo Ferreira (Autor) FCUP; Ana Filipa L. O. M. Santos (Autor) FCUP; Ferreira, CMA (Autor) Outra; Barros, DCB (Autor) Outra; Reis, JAC (Autor) Outra; Costa, JCS (Autor) Outra; Calvinho, MMG (Autor) Outra; Rocha, SIA (Autor) Outra; Pinto, SP (Autor) Outra; Freire, SSL (Autor) Outra; Almeida, SM (Autor) Outra; Guimaraes, VS (Autor) Outra; Almeida, VNM (Autor) Outra

Revista

Título: Journal of Chemical Thermodynamics

Vol. 42 Nº 10

Páginas: 371-379

ISSN: 0021-9614

Editora: Elsevier

Indexação

ISI Web of Knowledge - 14 Citações

Scopus - 14 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

CORDIS: Ciências Físicas > Química > Química física

Outras Informações

ID Authenticus: P-003-8QY

DOI: 10.1016/j.jct.2009.09.009

Abstract (EN): The standard (p degrees = 0.1 MPa) molar enthalpies of formation, in the crystalline state, of 1,5-diaminonaphthalene and 1,8-diaminonaphthalene were derived from the standard molar energies of combustion, in oxygen, at T = 298.15 K, measured by static-bomb combustion calorimetry. The Knudsen mass-loss effusion technique was used to measure the dependence of the vapour pressure of the solid isomers of diaminonaphthalene with the temperature, from which the standard molar enthalpies of sublimation were derived using the Clausius-Clapeyron equation. [GRAPHICS] Combining these two experimental values, the gas-phase standard molar enthalpies of formation, at T = 298.15 K, were derived and compared with those estimated using two different empirical methods of Delta fH degrees(m)(g) estimation: the Cox scheme and the Benson's Group Method. Moreover, the standard (p degrees = 0.1 MPa) molar entropies and Gibbs energies of sublimation, at T = 298.15 K, were derived for the two diaminonaphthalene isomers.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9