Excess volumes and speeds of sound of N-methyl-2-pyrrolidone with chloroethanes and chloroethenes at 303.15 K

Excess molar volumes (V-E) and the speed of sound (u) of binary mixtures of N-methyl-2-pyrrolidone with chloroethanes and ethenes have been measured at 303.15 K. The chloroethanes are 1,2-dichloroethane, 1,1,1-trichloroethane, and 1,1,2,2-tetrachloroethane. The chloroethenes are trichloroethene and tetrachloroethene. The speed of sound data were used to compute isentropic compressibilities (kappa(s)) and excess isentropic compressibilities (kappa(s)(E)). V-E values are negative over the entire mole fraction range. The kappa(s) values are negative over the whole volume fraction range for the systems of N-methyl-2-pyrrolidone with 1,1,1-trichloroethane, 1, 1,2,2-tetrachloroethane, and tetrachloroethene and positive for the systems of N-methyl-2-pyrrolidone with 1,2-dichloroethane and trichloroethene.