Densities and Excess molar volumes for Binary Solutions of Water + Methanol and + Ethanol from (۲۸۳.۱۵ to ۳۱۳.۱۵) K

Among the various thermodynamic properties, the excess volume, VE, has been of much interest for the practical purpose of determining composition from the density measurement [۱]. Density and excess molar volume are significant for the design of new processes and the study of molecular interactions in binary liquid systems [۲]. The excess volumes are defined as:VE = Volume of the solution – (volume of pure A + volume of pure B).In this paper Densities for binary solutions of two alcohol (Ethanol and Methanol) with water over the whole composition range have been measured at temperatures from (۲۸۳.۱۵ to ۳۱۳.۱۵) K in ۱۰ K intervals and atmospheric pressure. From these data, the excess molar volumes (VE) and their standard deviation į (VE) were calculated. This study is expected to give some information about the volume changes in these binary solutions that indicate the tendency of the water molecules with simple alcohols.

کلیدواژه ها:

Density ، Excess volume ، Binary Solution ، Methanol ، Ethanol