Thermodynamic study of the sublimation of six aminomethylbenzoic acids

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

Autores

Monte, MJS (Autor) FCUP; Hillesheim, DM (Autor) Outra

Revista

Título: Journal of Chemical Thermodynamics

Vol. 33

Páginas: 745-754

ISSN: 0021-9614

Editora: Elsevier

Indexação

ISI Web of Knowledge - 13 Citações

Scopus - 14 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia mecânica

Outras Informações

ID Authenticus: P-000-V30

DOI: 10.1006/jcht.2000.0774

Abstract (EN): The Knudsen mass-loss effusion technique was used to measure the vapour pressures at different temperatures of the following substituted benzoic acids: 2-amino-3-methylbenzoic acid at T between 343.16 K and 357.17 K; 2-amino-5-methylbenzoic acid at T between 345.15 K and 361.16 K; 2-amino-6-methylbenzoic acid at T between 339.17 K and 355.15 K; 3-amino-2-methylbenzoic acid at T between 367.16 K and 381.22 K; 3-amino-4-methylbenzoic acid at T between 363.18 K and 377.16 K; and 4-amino-3-methylbenzoic acid at T between 367.17 K and 383.14 K. The standard, P-0 = 10(5) Pa, molar enthalpies, entropies, and Gibbs energies of sublimation at T = 298.15 K were derived from the temperature dependence of the vapour pressure using estimated values for the heat capacity differences between the gas and the crystal phases of the studied compounds. [GRAPHICS] (C) 2001 Academic Press.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10