VAPOR-PRESSURES AND ENTHALPIES OF SUBLIMATION OF 6 HALOGEN-SUBSTITUTED 8-HYDROXYQUINOLINES

• Type: Article in International Scientific Journal
• Date: 1992

Authors

DASILVA, MAVR (Author) FCUP; MONTE, MJS (Author) FCUP

Journal

Title: Journal of Chemical Thermodynamics

Vol. 24

Pages: 715-724

ISSN: 0021-9614

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 54 Citations

Scopus - 54 Citations

Scientific classification

FOS: Engineering and technology > Mechanical engineering

Other information

Authenticus ID: P-001-PEA

Abstract (EN): The Knudsen mass-loss effusion technique was used to measure the vapour pressure as a function of temperature for six halogen-substituted 8-hydroxyquinolines. From the temperature dependence of the vapour pressure, the standard molar enthalpies of sublimation ¿g crHo m(Tm), at the mean temperature Tm of the experimental temperature range were derived, and the standard molar enthalpies of sublimation at T = 298.15 K were calculated. {A figure is presented}. The results obtained in this work together with the previously reported ones for other hydroxyquinolines, allowed us to find the correlation: ¿cr g Hm o (T0.5 Pa) / (kJ {dot operator} mol- 1) = 0.313 (T0.5 Pa / K) - 3.68,. where T0.5 Pa is the temperature at which the equilibrium vapour pressure of each substance is 0.5 Pa.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10