Abstract Density and viscosity data of pure 3-chloro-4-fluoronitrobenzene and 3-chloro-2-fluoronitrobenzene were obtained in temperature range from 318.15 K to 348.15 K at the local atmospheric pressure of 99.7 kPa. The value of corresponding saturated vapour pressure of two isomers were determined in the temperature range of 409 K to 517 K. The relationship between temperature and density can be well correlated by the linear equation. The viscosity data was well described by the Litovitz, Ghatee, VFT, and Andrade equations, and the calculated value by the VFT equation is consistent with the measured data. Both the Antoine and Riedel equations can accurately describe the relationship between saturated vapour pressure and temperature of 3-chloro-4-fluoronitrobenzene and 3-chloro-2-fluoronitrobenzene, which can meet the requirements for chemical design. In addition, the thermal expansion coefficient was determined based on the density data, and the molar vaporisation enthalpy of two isomers was evaluated using the Clausius-Clapeyron equation.

中文翻译：

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3-氯-4-氟硝基苯和3-氯-2-氟硝基苯的密度、粘度和饱和蒸气压

摘要 在318.15 K～348.15 K、当地大气压99.7 kPa条件下，得到纯3-氯-4-氟硝基苯和3-氯-2-氟硝基苯的密度和粘度数据。在 409 K 至 517 K 的温度范围内确定了两种异构体相应的饱和蒸气压值。温度和密度之间的关系可以通过线性方程很好地关联起来。Litovitz、Ghatee、VFT和Andrade方程对粘度数据进行了很好的描述，VFT方程计算值与实测数据一致。Antoine方程和Riedel方程都可以准确描述3-氯-4-氟硝基苯和3-氯-2-氟硝基苯的饱和蒸气压与温度的关系，能满足化学设计的要求。此外，根据密度数据确定热膨胀系数，并使用克劳修斯-克拉珀龙方程评估两种异构体的摩尔蒸发焓。