The Surface Tension of Liquid Gases for Low-boiling Point

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=γ⁰（1 - T/T_C)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.