Viscosity and surface tension of binary systems of N,N -dimethylformamide with alkan-1-ols at different temperatures

作者: Abubaker A. Mohammad , Khaled H.A.E. Alkhaldi , Mohammad S. AlTuwaim , Adel S. Al-Jimaz

DOI: 10.1016/J.JCT.2012.06.023

关键词:

摘要: Abstract Viscosity η and surface tension σ were measured for binary mixtures of N,N -dimethylformamide DMF with pentan-1-ol, hexan-1-ol, heptan-1-ol at T =  (298.15, 303.15, 308.15, 313.15) K atmospheric pressure over the entire mole fraction range. Deviations in viscosity Δ Δσ calculated using experimental results. Moreover, values excess Gibbs free energy activation G ∗E , enthalpy H entropy S these determined. measurements systems correlated Grunberg Nissan, three-body four-body McAllister expressions. deviation, deviation functions fitted to method Redlich–Kister (R–K) polynomial estimate coefficients standard deviations. The effects chain length alkan-1-ols temperature on thermodynamic properties studied.

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