INVESTIGADORES
CASTELLS Cecilia Beatriz
artículos
Título:
Thermodynamics of tetra-n-octyltin + hydrocarbon systems by gas-liquid chromatography
Autor/es:
CASTELLS, R. C.; CASTELLS, C. B.
Revista:
JOURNAL OF SOLUTION CHEMISTRY
Editorial:
SPRINGER/PLENUM PUBLISHERS
Referencias:
Lugar: New York; Año: 1992 vol. 21 p. 129 - 146
ISSN:
0095-9782
Resumen:
The activity coefficients of fifteen hydrocarbons at infinite dilution
in tetra-n-octyltin were measured using gas-liquid chromatography at
five temperatures between 40 and 60°C. Partial molar excess
thermodynamic properties are calculated from the experimental results,
and discussed within the framework of the equation of state theory of
Flory and of the Ising fluid theory of Sanchez and Lacombe. Both
theories results in binary mixture characteristic parameters (X12 and ΔP*,
respectively) that decrease linearly with the temperature. The results
may be interpreted by assuming that there is orientational order in pure
tetra-n-octyltin and in pure n-alkanes, but not in the remaining
solutes; the destruction of this order on mixing the hydrocarbons with
the tin compound results in important contributions to the excess
thermodynamic properties