SPEEDS OF SOUND, ISENTROPIC COMPRESSIBILITIES, AND EXCESS VOLUMES OF BINARY-MIXTURES .3. DI-N-ALKYLAMINES WITH CYCLOHEXANE AND BENZENE

Isentropic compressibilities K-S, excess isentropic compressibilities K-S(E), and excess volumes V-E have been determined from speeds of sound U and densities rho for six binary mixtures of butylamine, dihexylamine, and dioctylamine with cyclohexane or benzene as a function of the mole fraction at 303.15 K. Variable-degree polynomials have been fitted to the results. V-E and K-S(E) values are positive over the entire range of composition for all mixtures except cyclohexane + dioctylamine which have negative K-S(E).