Artículo
Méndez De Leo, L.P.; Bianchi, H.L.; Fernández-Prini, R.J. "Thermodynamics of 4-methylphenol dissociation in water at high temperature using uv-vis spectroscopy" (2002) Journal of Chemical Thermodynamics. 34(9):1467-1479
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Abstract:
The dissociation equilibrium of 4-methylphenol in aqueous solutions has been studied spectrophotometrically over the temperature range 298 to 448 K; at higher temperatures the anion decomposed appreciably. The solutions that were studied had different ratios of weak acid to conjugated base, and the ionic strength was varied with sodium trifluoromethane sulfonate between 0.0 mol·kg-1 and 0.3 mol·kg-1. The overall analysis of the optical absorption of the solutions in the range 250 to 380 nm was based on the corresponding isocoulombic reaction. We report the values of the thermodynamic quantities at 298.2 K for the two equilibria. The results also suggest that 4-methylphenol may be used as an indicator to study equilibria of other weak aqueous electrolytes. © 2002 Elsevier Science Ltd. All rights reserved.
Registro:
| Documento: | Artículo |
| Título: | Thermodynamics of 4-methylphenol dissociation in water at high temperature using uv-vis spectroscopy |
| Autor: | Méndez De Leo, L.P.; Bianchi, H.L.; Fernández-Prini, R.J. |
| Filiación: | Unidad de Actividad Qumíca, Comisión Nacional de Energía Atómica, Av. Libertador 8250, 1429-Capital Federal, Argentina Unidad de Actividad Química, Comisión Nacional de Energia Atomica, Av. Libertador 8250, 1429 Capital Federal, Argentina Escuela de Ciencia y Tecnología, Univ. Nac. General San Martín, Alem 3901, 1651 San Andrés, Argentina Unidad de Actividad Qumíca, Comisión Nacional de Energía Atómica, Av. Libertador 8250, 1429-Capital Federal, Argentina Instituto de Química Física de Materiales, Ambiente y Energía, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, 1428-Capital Federal, Argentina |
| Palabras clave: | 4-methylphenol; Dissociation; Equilibrium; High temperature; Thermodynamics; Dissociation; Electrolytes; High temperature effects; Ionic strength; Light absorption; Negative ions; Phenols; Sodium compounds; Solutions; Spectrophotometry; Ultraviolet spectroscopy; Water; Isocoulombic reaction; Methylphenol; Sodium trifluoromethane sulfonate; Thermodynamics |
| Año: | 2002 |
| Volumen: | 34 |
| Número: | 9 |
| Página de inicio: | 1467 |
| Página de fin: | 1479 |
| DOI: | http://dx.doi.org/10.1016/S0021-9614(02)00203-3 |
| Título revista: | Journal of Chemical Thermodynamics |
| Título revista abreviado: | J. Chem. Thermodyn. |
| ISSN: | 00219614 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00219614_v34_n9_p1467_MendezDeLeo |
Referencias:
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Citas:
---------- APA ----------
Méndez De Leo, L.P., Bianchi, H.L. & Fernández-Prini, R.J. (2002) . Thermodynamics of 4-methylphenol dissociation in water at high temperature using uv-vis spectroscopy. Journal of Chemical Thermodynamics, 34(9), 1467-1479.http://dx.doi.org/10.1016/S0021-9614(02)00203-3
---------- CHICAGO ----------
Méndez De Leo, L.P., Bianchi, H.L., Fernández-Prini, R.J. "Thermodynamics of 4-methylphenol dissociation in water at high temperature using uv-vis spectroscopy" . Journal of Chemical Thermodynamics 34, no. 9 (2002) : 1467-1479.http://dx.doi.org/10.1016/S0021-9614(02)00203-3
---------- MLA ----------
Méndez De Leo, L.P., Bianchi, H.L., Fernández-Prini, R.J. "Thermodynamics of 4-methylphenol dissociation in water at high temperature using uv-vis spectroscopy" . Journal of Chemical Thermodynamics, vol. 34, no. 9, 2002, pp. 1467-1479.http://dx.doi.org/10.1016/S0021-9614(02)00203-3
---------- VANCOUVER ----------
Méndez De Leo, L.P., Bianchi, H.L., Fernández-Prini, R.J. Thermodynamics of 4-methylphenol dissociation in water at high temperature using uv-vis spectroscopy. J. Chem. Thermodyn. 2002;34(9):1467-1479.http://dx.doi.org/10.1016/S0021-9614(02)00203-3
