Thermodynamic Properties of Moldy-Musty Contaminants of Wine

• Tipo: Artigo em Revista Científica Internacional
• Data: 2019

Autores

Almeida, ARRP (Autor) FCUP; Pinheiro, BDA (Autor) Outra; Lima, CFRAC (Autor) FCUP; Santos, AFLOM (Autor) Outra; Ferreira, ACS (Autor) Outra; Almeida Paz, FAA (Autor) Outra; Manuel J S Monte (Autor) FCUP

Revista

Título: Journal of Chemical & Engineering Data

Vol. 64

Páginas: 4741-4753

ISSN: 0021-9568

Editora: American Chemical Society

Indexação

ISI Web of Knowledge - 5 Citações

Scopus - 6 Citações

Outras Informações

ID Authenticus: P-00Q-PR5

DOI: 10.1021/acs.jced.9b00062

Abstract (EN): This paper reports thermodynamic properties of phase transitions of 2,4,6-trichloro and 2,4,6-tribromo anisoles and of 2,4,6-tribromophenol. The vapor pressures of both crystalline and liquid phases (including supercooled liquid) of the three compounds were measured, respectively, in the temperature ranges T = (297.1 to 368.3) K, T = (330.7 to 391.7) K, and T = (336.5 to 401.7) K, using a static method based on capacitance diaphragm manometers. Moreover, the sublimation vapor pressures of 2,4,6-tribromophenol were also measured in the temperature interval (307.2 to 329.2) K, using a Knudsen mass-loss effusion technique. The standard molar enthalpies, entropies, and Gibbs energies of sublimation and of vaporization, at reference temperatures, were derived from the experimental results as well as the (p,T) values of the triple point of each compound. The temperatures and molar enthalpies of fusion of the three benzene derivatives were determined using differential scanning calorimetry and were compared with the values derived indirectly from the vapor pressure measurements. The thermodynamic results were discussed together with the available literature data for 2,4,6-trichlorophenol. To help rationalize the phase behavior of these substances, the crystallographic structure of 2,4,6-tribromophenol was determined by single crystal X-ray diffraction.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13