Standard molar enthalpies of formation of 1-and 2-cyanonaphthalene

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

da Silva, MAVR (Autor) FCUP; Ana I M C L Lobo Ferreira (Autor) FCUP; Barros, ALM (Autor) Outra; Bessa, ARC (Autor) Outra; Brito, BCSA (Autor) Outra; Vieira, JAS (Autor) Outra; Martins, SAP (Autor) Outra

Revista

Título: Journal of Chemical Thermodynamics

Vol. 43

Páginas: 1306-1314

ISSN: 0021-9614

Editora: Elsevier

Indexação

ISI Web of Knowledge - 5 Citações

Scopus - 1 Citação

Outras Informações

ID Authenticus: P-002-NK0

DOI: 10.1016/j.jct.2011.03.013

Abstract (EN): The standard (p degrees = 0.1 MPa) molar enthalpies of formation, in the crystalline state, of the 1- and 2-cyanonaphthalene were derived from the standard molar energies of combustion, in oxygen, at T = 298.15 K, measured by static-bomb combustion calorimetry. Vapor pressure measurements at different temperatures, using the Knudsen mass loss effusion technique, enabled the determination of the enthalpy, entropy, and Gibbs energy of sublimation, at T = 298.15 K, for both isomers. The standard molar enthalpies of sublimation, at T = 298.15 K. for 1- and 2-cyanonaphthalene, were also measured by high-temperature Calvet microcalorimetry. [GRAPHICS] Combining these two experimental values, the gas-phase standard molar enthalpies. at T = 298.15 K, were derived and compared with those estimated by employing two different methodologies: one based on the Cox scheme and the other one based on G3MP2B3 calculations. The calculated values show a good agreement with the experimental values obtained in this work.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9