TEMPERATURE-DEPENDENCE OF MOLAR EXCESS VOLUMES FOR THE DIMETHYL-SULFOXIDE PLUS THIOPHENE SYSTEM AND THERMAL-EXPANSION COEFFICIENTS BETWEEN 293.15 AND 313.15 K

Densities were measured with a vibrating-tube densimeter for binary mi xtures of dimethyl sulfoxide + thiophene at temperatures from 293.15 t o 313.15 K as a function of composition. Molar excess volumes V(E) for the mixtures, determined from the density data, are negative and beco me more negative with an increase in temperature. The coefficients of thermal expansion were also evaluated from the temperature dependence of the density.