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

• Tipo: Artigo em Revista Científica Internacional
• Data: 1992

Autores

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

Revista

Título: Journal of Chemical Thermodynamics

Vol. 24

Páginas: 715-724

ISSN: 0021-9614

Editora: Elsevier

Indexação

ISI Web of Knowledge - 54 Citações

Scopus - 54 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia mecânica

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10