Thermodynamics of Mixtures Containing Amines. XII. Volumetric and Speed of Sound Data at (293.15, 298.15, and 303.15) K for N-Methylaniline + Hydrocarbon Systems

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• 作者：Iv谩n Alonso ; Isa铆as Garc铆a de la Fuente ; Juan Antonio Gonz谩lez ; Jos茅 Carlos Cobos
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2013
• 出版时间：June 13, 2013
• 年：2013
• 卷：58
• 期：6
• 页码：1697-1705
• 全文大小：342K
• 年卷期：v.58,no.6(June 13, 2013)
• ISSN：1520-5134

文摘

A vibrating tube densimeter and sound analyzer Anton Paar model DSA-5000 has been used for the measurement of densities, 蟻, and speeds of sound, c, of N-methylphenylamine (N-methylaniline) + heptane, or + cyclohexane, or + toluene mixtures at (293.15 to 303.15) K and atmospheric pressure. From these data, we have obtained excess molar volumes, V_m^E, at the three temperatures and excess functions for c and the isentropic compressibility, K_S at 298.15 K. V_m^E results reveal the existence of structural effects in alkane solutions and of interactions between unlike molecules in systems with toluene. N-Methylaniline + hydrocarbon mixtures have been characterized in terms of the ERAS model. The theory provides a good representation of excess molar enthalpies, H_m^E, and describes correctly the relative variation of V_m^E. ERAS calculations show the importance of the physical interactions in the studied systems, which is consistent with the experimental H_m^E and V_m^E data.