Excess molar volumes of (cyclohexanone plus trichloromethane, or 1,2-dichloroethane, or trichloroethene, or 1,1,1-trichloroethane, or cyclohexane) at T = 308.15 K, and of (cyclohexanone plus dichloromethane) at T = 303.15 K

摘要

Excess molar volumes V-m(E) have been measured using a dilatometric technique for mixtures of cyclohexanone (C6H10O) with trichloromethane (CHCl3), 1,2-dichloroethane (CH2ClCH2Cl), trichloroethene (CHClCCl2), 1,1,1-trichloroethane (CCl3CH3), and cyclohexane (c-C6H12) at T= 308.15 K, and for cyclohexanone + dichloromethane (CH2Cl2) at T= 303.15 K. Throughout the entire range of the mole fraction chi of C6H10O, V-m(E) has been found to be positive for chi C6H10O + (1 - chi)c-C6H12, and negative for chi C6H10O + (1- chi)CH2Cl2, chi C6H10O +(1 -chi)CHClCCl2, chi C6H10O +(1 -chi)CHCl3, and chi C6H10O +(1 -chi) CCl3CH3. For chi C6H10O + (1 - chi)CH2ClCH2Cl, V-m(E) has been found to be positive at lower values of chi and negative at high values of chi, with inversion of sign from positive to negative values of V-m(E) for this system occurring at chi similar to 0.78. Values of V-m(E) for the various systems have been fitted by the method of least squares with smoothing equation, and have been discussed from the viewpoint of the existence specific interactions between the components. (C) 1998 Elsevier Science B.V. All rights reserved. [References: 8]