Enthalpies of combustion, vapour pressures, and enthalpies of sublimation of three methoxy-nitrobenzoic acids. Vapour pressures and enthalpies of sublimation of the three nitrobenzoic acids

• Tipo: Artigo em Revista Científica Internacional
• Data: 1999

Autores

da Silva, MAVR (Autor) FCUP; Matos, MAR (Autor) FCUP; Monte, MJS (Autor) FCUP; Hillesheim, DM (Autor) Outra; Marques, MCPO (Autor) Outra; Vieira, NFTG (Autor) Outra

Revista

Título: Journal of Chemical Thermodynamics

Vol. 31

Páginas: 1429-1441

ISSN: 0021-9614

Editora: Elsevier

Indexação

ISI Web of Knowledge - 30 Citações

Scopus - 32 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia mecânica

Outras Informações

ID Authenticus: P-001-2ZR

DOI: 10.1006/jcht.1999.0507

Abstract (EN): The standard (p(o) = 0.1 MPa) molar enthalpies of formation for crystalline 3-methoxy-2-nitro-, 4-methoxy 3-nitro-, and 3-methoxy-4-nitrobenzoic acid were derived from the standard molar enthalpies of combustion, in oxygen, at the temperature 298.15 K, measured by static bomb combustion calorimetry, the Knudsen mass-loss effusion technique was used to measure the vapour pressures of these crystals as functions of temperature, and the standard molar enthalpies of sublimation, at T = 298.15 K, were derived by the Clausius-Clapeyron equation. The standard molar enthalpies of sublimation, at T = 298.15 K, for the three nitrobenzoic acids were also determined using the Knudsen mass-loss effusion technique. [GRAPHICS] The standard molar enthalpies of formation in the gaseous state are shown to fit a group additivity scheme. (C) 1999 Academic Press.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13