【摘要】 <正> The well known formula of Andradefor the viscosity η of a liquid at itsfreezing point is η=3/4vm/σ, (1)where m is the molecular mass,σtheaverage intermolecular distance(center-to-center),and υ the frequency of mole-cular vibration of the liquid.Denotingmolar volume by V,Avogadro numberby N,freezing point by T,gas constantby R,molecular Weight by M,andmolecular radius by a,we may put更多还原