BIBLIOS

Document type
Journal articles

Document subtype
Full paper

Title
Densities and refractive indices for the ternary mixture methanol/propan-1-ol/acetonitrile

Participants in the publication
F. Martins (Author)
Dep. Química e Bioquímica
CQB
R. Elvas Leitão (Author)
M. C. Ventura (Author)
L. Pinheiro (Author)
N. Nunes (Author)

Summary
Refractive indices, nD, and densities, ρ, at 298.15 K were measured for the ternary mixture methanol (MeOH)/propan-1-ol (1-PrOH)/acetonitrile (MeCN) for a total of 22 mole fractions, along with 18 mole fractions of each of the corresponding binary mixtures, methanol/propan-1-ol, propan-1-ol/acetonitrile and methanol/acetonitrile. The variation of excess refractive indices and excess molar volumes with composition was modeled by the Redlich–Kister polynomial function in the case of binary mixtures and by the Cibulka equation for the ternary mixture. A thermodynamic approach to excess refractive indices, recently proposed by other authors, was applied for the first time to ternary liquid mixtures. Structural effects were identified and interpreted both in the binary and ternary systems. A complex relationship between excess refractive indices and excess molar volumes was identified, revealing all four possible sign combinations between these two properties. Structuring of the mixtures was also discussed on the basis of partial molar volumes of the binary and ternary mixtures.


Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Where published
JOURNAL OF MOLECULAR LIQUIDS

Publication Identifiers
ISSN - 0167-7322

Publisher
Elsevier



Document Identifiers
DOI - https://doi.org/10.1016/j.molliq.2012.03.015
URL - https://doi.org/10.1016/j.molliq.2012.03.015

Rankings
SCIMAGO Q2 (2012) - 0.679 - Physical and Theoretical Chemistry
Web Of Science Q3 (2012) - 1.684 - Physical Chemistry

Keywords
Ternary mixture Methanol Acetonitrile Propan-1-ol Refractive index Density Molar volume Excess properties