液态低沸点气体的表面张力

The Surface Tension of Liquid Gases for Low-boiling Point

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.