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

• Type: Article in International Scientific Journal
• Date: 2008

Authors

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

Journal

Title: Journal of Chemical & Engineering Data

Vol. 53 No. 10

Pages: 1922-1926

ISSN: 0021-9568

Publisher: American Chemical Society

Indexing

ISI Web of Knowledge - 8 Citations

Scopus - 8 Citations

Scientific classification

FOS: Engineering and technology > Chemical engineering

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5