## PHASE VAPOR–LIQUID EQUILIBRIUM FOR THE SOLUTIONS OF DIETHYL SELENIDE AND DIETHYLZINC

**Using a semi-empirical Wilson****’s**** model, the vapor-liquid equilibrium in the ****“****diethylzinc** **-** **diethyl** **seleni****de”**** system is described: the activity coefficients of the solution components, the separation coefficient, the excess functions of the solution ( HE, GE, TSE) are calculated, and isothermal P**

**-**

**X diagrams are**

**obtained**

**.**