EXCESS VOLUMES OF TERNARY MIXTURES OF N,N-DIMETHYLFORMAMIDE-DIETHYL KETONE-1-ALKANOLS AT 303.15 K

Volume changes on mixing of ternary liquid mixtures of N,N-dimethylfor mamide and diethyl ketone with 1-alkanols have been measured as a func tion of composition at 303.15 K. The alkanols include 1-propanol, 1-bu tanol, 1-pentanol and 1-hexanol. The measured V-E values are negative in the mixtures of N,N-dimethylformamide, diethyl ketone and 1-propano l, or 1-butanol. The V-E data exhibits an inversion in sign in the mix ture containing 1-pentanol and positive excess volumes are observed in the mixture containing 1-hexanol. The measured data are compared with predicted values based upon empirical relations. The excess volume fo r the binary mixture of N,N-dimethylformamide with diethyl ketone has been measured over the entire range of composition at 303.15. The V-E values are negative for the binary mixture.