In the present study, the liquid viscosity and surface tension of benzene was determined at saturation conditions from surface light scattering (SLS) experiments between (283 and 393) K. Based on the application of the hydrodynamic theory for surface fluctuations at the vapor–liquid phase boundary which was successfully validated by the measurements, a simultaneous determination of liquid viscosity and surface tension with average relative expanded uncertainties (k = 2) of (1.0 and 0.8)% was achieved. Agreement between the measurement data and reference values available in the literature was found for the viscosity and in general also for the surface tension, where benzene constitutes a recommended reference material of relatively moderate surface tension values. All these findings demonstrate for a repeated time that SLS is a suitable method for the investigation of fluids including reference fluids such as benzene, which enables a sound representation of its surface tension, presumably as a result of a rather random molecular orientation at the surface. Overall, the experimental results from this work could contribute to an improved data situation for benzene, in particular with respect to providing viscosities and surface tensions at true saturation conditions.

在本研究中，苯的液体粘度和表面张力是在饱和条件下通过 (283 和 393) K 之间的表面光散射 (SLS) 实验确定的。通过测量成功验证了相界，同时测定液体粘度和表面张力，平均相对扩展不确定度 ( k = 2) 达到 (1.0 和 0.8)%。发现测量数据与文献中可用的参考值之间的一致性用于粘度，一般也用于表面张力，其中苯构成推荐的具有相对适中表面张力值的参考材料。所有这些发现反复证明，SLS 是研究流体（包括苯等参考流体）的合适方法，这可以很好地表示其表面张力，这可能是由于表面上相当随机的分子取向造成的。总的来说，这项工作的实验结果有助于改善苯的数据情况，特别是在提供真正饱和条件下的粘度和表面张力方面。