摘要
利用双毛细管法测定了液氮沸点温度下液氮的表面张力.用非线性方程γ=γ0(1-T/TC)n描述了液态N2、O2、Ar、Xe、H2、Ne、He、F2和Kr的表面张力与温度的关系,并采用一元线性回归的方法拟合了上述各流体的多数γ0和n,准确度高于文献值,说明方程能正确表达表面张力与温度的关系.这些数据有利于对上述低沸点气体进行准确的热力学计算.
The surface tension of liquid nitrogen at 77K is measured to be 9.053dyn/cm in terms of the double capillary method, which may be reasonable in comparison with the single capillary method. The nonlinear equation γ=γ°(1 - T/TC)n has been used to describe the relation between the surface tension with the temperature for liquefied N2, O2, Ar, Xe, H2, Ne, He, F2,D2 and Kr. The parameters γ0 and n of the liquefied gases above are fitted by the linear regression method with higher accuracy than that in the literatures.
基金
国防科技重点实验室基金!98JS77.7.JW1903
关键词
表面张力
低沸点气体
双毛细管法
液氮
Surface tension, Low-boiling point gas, Double capillary method