Abstract
Experimental values of densities (ρ), and speeds of sound (u) at T=298.15K in the binary mixtures of n-octane, n-decane, n-dodecane and n-tetradecane with octan-2-ol are presented over the whole range of mixture composition. From these data, excess molar volumes (VmE), excess isentropic compressibility (kEs), excess intermolecular free length (LfE), excess specific acoustic impedance (ZE) and excess available volume (VaE) have been calculated. These results were fitted to Redlich–Kister polynomial equations to estimate the binary coefficients and standard errors. Comparisons of theoretical ultrasonic speeds, calculated by using collision factor theory (CFT), free length theory (FLT) and Nomoto's empirical equation (NOM) and the results have been compared with experimental values. The deviation from the ideality of these parameters is explained on the basis of molecular interactions between components of the mixture.
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