Molal volume of multicomponent liquid mixtures of non-electrolytes

Inspite of tremendous impressive developments of the molecular theory, an e ngineer frequently finds the need for physical properties, which have not b een measured. The molal Volume of a fluid at a given pressure and temperatu re is an equilibrium thermodynamic property. In the present work, Wassiljew a equation in conjunction with Hildebrand's relation has been applied to ev aluate molal Volume of the various classes of liquid mixtures (binary, tern ary and quaternary). It: has the advantage over the empirical relations sin ce it can be applied to a wide variety of fluids in moderate range. Moreove r, it is very simple in form and the parameters have physical significance that is easy to conceive. It was observed after extensive fitting to the Hi ldebrand relation that V-0 for most pure fluid range between 0.3 and 0.32 t imes the critical volume.