Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/5100
Título: Densities and refractive indices for the ternary mixture methanol/propan-1-Ol/acetonitrile
Autor: Leitão, Ruben Elvas
Martins, Filomena
Ventura, M. Cristina
Pinheiro, Lídia
Nunes, Nelson
Palavras-chave: Ternary Mixture
Refractive Index
Molar Volume
Excess Properties
Excess Molar Volumes
Acetonitrile Plus Methanol
Binary-Liquids Mixtures
298.15 K
Data: Jun-2012
Editora: Elsevier Science BV
Citação: LEITÃO, R. E., [et al] – Densities and refractive indices for the ternary mixture methanol/propan-1-Ol/acetonitrile. Journal of Molecular Liquids. ISSN: 0167-7322. Vol. 170 (2012), pp. 30-36
Resumo: Refractive indices, n(D), and densities, rho, 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.
Peer review: yes
URI: http://hdl.handle.net/10400.21/5100
DOI: 10.1016/j.molliq.2012.03.015
ISSN: 0167-7322
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