ABSTRACT

The pseudo-Gruneisen parameter $\mathrm{\Gamma }$, effective Debye temperature${\theta }_D$, acoustic nonlinearity parameter $B/A$, internal pressure $P_{in}$ and isobaric thermal expansion coefficient $\alpha$ have been evaluated for binary liquid mixtures of formamide (FA) and N-methylformamide (NMF) with 2-chloroethanol (2Cl-OH) at 298.15 K, 308.15 K and 318.15 K, over the entire concentration range. The excess pseudo-Gruneisen parameter ${\mathrm{\Gamma }}^E$, excess effective Debye temperature ${\theta }_{{ }_D}^E$, excess nonlinearity parameter$(B/A{)}^E$, excess internal pressure $P_{{ }_{in}}^E$and excess isobaric thermal expansion coefficient ${\alpha }^E$ were also calculated. The calculated values are reasonably satisfactory with the experimental results on sound propagation data of liquid mixtures. These physicochemical parameters play an important role in understanding of the significance of anharmonic and nonlinear behaviour with regard to intermolecular interactions in the liquid mixtures.

摘要

伪 Gruneisen 参数 $\mathrm{\Gamma }$, 有效德拜温度${\theta }_D$, 声学非线性参数 $乙/\mathrm{一种}$, 内压 ${磷}_{\mathrm{一世}n}$ 和等压热膨胀系数 $\alpha$已针对甲酰胺 (FA) 和 N-甲基甲酰胺 (NMF) 与 2-氯乙醇 (2Cl-OH) 在整个浓度范围内在 298.15 K、308.15 K 和 318.15 K 的二元液体混合物进行了评估。多余的伪 Gruneisen 参数${\mathrm{\Gamma }}^{乙}$, 超有效德拜温度 ${\theta }_{{ }_D}^{乙}$, 多余的非线性参数$(乙/\mathrm{一种}{)}^{乙}$, 内部压力过大 ${磷}_{{ }_{\mathrm{一世}n}}^{乙}$和过量的等压热膨胀系数 ${\alpha }^{乙}$也进行了计算。计算值与液体混合物声传播数据的实验结果相当令人满意。这些物理化学参数在理解液体混合物中分子间相互作用的非谐和非线性行为的重要性方面起着重要作用。