Vapor pressures of solid and liquid xanthene and phenoxathiin from effusion and static studies

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

Manuel J S Monte (Autor) FCUP; Luis M N B F Santos (Autor) FCUP; Carlos A D Sousa (Autor) Outra; Michal Fulem (Autor) Outra

Revista

Título: Journal of Chemical & Engineering Data

Vol. 53 Nº 10

Páginas: 1922-1926

ISSN: 0021-9568

Editora: American Chemical Society

Indexação

ISI Web of Knowledge - 8 Citações

Scopus - 8 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

Outras Informações

ID Authenticus: P-003-XBV

DOI: 10.1021/je800333q

Abstract (EN): Vapor pressures of xanthene [CAS Registry No. 92-83-1] and phenoxathiin [CAS Registry No. 262-20-4] were measured in the temperature range from (318 to 382) K [(0.5 to 127) Pa] and from (318 to 373) K [(0.5 to 36) Pa], respectively, using a static method, in both crystalline and liquid phases. The vapor pressures of the crystalline phases of both compounds were also measured in the pressure range (0.1 to 1) Pa using the Knudsen effusion method. From the experimental results, the standard molar Gibbs energies and enthalpies of sublimation/vaporization, at T = 298.15 K, and the triple-point coordinates for these two compounds were derived. The enthalpies and temperatures of fusion were also determined using differential scanning calorimetry. To the best of our knowledge, vapor pressure data reported here are the first for crystalline phenoxathiin and for liquid xanthene.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5