K. Pavan Krishna, P.B. Sandhya Sri, D. C. Sekhar, T.V.L.N. Balaji Gupta, R.L. Satyanarayana
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引用次数: 0
摘要
在 303.15-318.15 K 的完整分子分数组成范围内，研究了丙二酸二甲酯与邻二甲苯、对二甲苯和间二甲苯的二元液体混合物的密度和超声波速度。选择这些参数是为了研究取代基和特定位置对二元混合物若干热力学特性的影响。绝热可压缩性（Δβad）、过量摩尔体积（VE）和过量分子间自由长度（LfE）的偏差是利用实验测量结果估算出来的。这些外在参数与 Redlich-Kister 类型的多项式方程进行了拟合。在获得参数值的同时，还确定了标准偏差 (σ)。
Excess Thermodynamic Parameters of Binary Liquid Mixtures of Dimethyl Malonate with Isomeric Xylenes at Different Temperatures
Over the complete composition range of mole fractions, densities and ultrasonic velocities of binary liquid mixtures of dimethyl malonate with o-xylene, p-xylene and m-xylene were investigated at 303.15-318.15 K. These parameters were chosen to investigate the impact of substituents and specific locations on several thermodynamic characteristics of binary mixtures. The deviation in adiabatic compressibility (∆βad), excess molar volume (VE) and excess intermolecular free length (LfE) were estimated using the experimental measurements. These extraneous parameters are fitted to a polynomial equation of the Redlich-Kister type. Along with the obtained parameter values, the standard deviation (σ) was also determined.
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