Study on Excess Molar Enthalpies and Excess Molar Volumes of the Binary Systems 1,2-Dichlorobenzene + (Benzene, Hexane, 1-Chlorohexane) and 1,3-Dichlorobenzene + (Benzene, Hexane, 1-Chlorohexane) at 298.15 K

Abstract

Excess molar enthalpies, H m E , and excess molar volumes, V m E , have been measured at T ) 298.15 K and normal atmospheric pressure for the binary 1,2-dichlorobenzene + (benzene, hexane, or 1-chlorohexane) and 1,3-dichlorobenzene + (benzene, hexane, or 1-chlorohexane) systems using a Calvet microcalorimeter and a vibrating tube densimeter, respectively. The experimental values of H m E and V m E of the mixtures are found to be positive or negative depending on the type and magnitude of the interactions involved in each process. The results are compared with those found in the literature.

Effect of halogen substitution on the enthalpies of solvation and hydrogen bonding of organic solutes in chlorobenzene and 1,2-dichlorobenzene derived using multi-parameter correlations

“…Normally the enthalpic measurements are made over the entire binary composition range. There are a few data sets [61,64,[77][78][79][80]] that we found which provide experimental measurements at sufficient low mole fraction compositions where extrapolations to infinite dilution could be made to obtain enthalpies of solution of solutes dissolved in chlorobenzene and 1,2-dichlorobenzene at 298.15 K. In Table 6 we compare our measured Table 4 should be more than sufficient for developing meaningful…”

Excess Molar Enthalpies and Excess Molar Volumes of the Ternary System 1,2-Dichlorobenzene + Benzene + 1-Chlorohexane at 298.15 K

“…The mole fraction purities of the chemicals were as follows: >0.99 mole fraction for 1,2-dichlorobenzene and 1-chlorohexane (Fluka); >0.999 mole fraction for benzene (Aldrich). The densities of the pure liquids used have been published previously by Mato et al 1 The handling and disposal of the chemicals used has been done according to the recommendation of the CRC Handbook of Chemistry and Physics. 13 Apparatus and Procedure.…”

“…This work reports experimental excess molar enthalpies and excess molar volumes for the ternary system {( x 1 )1,2-dichlorobenzene + ( x 2 )benzene + (1 − x 1 − x 2 )1-chlorohexane} and the involved binary mixture {( x )benzene + (1 − x )1-chlorohexane} at the temperature 298.15 K and atmospheric pressure. The excess molar enthalpies and excess molar volumes for the binary mixtures {( x )1,2-dichlorobenzene + (1 − x )benzene} and {( x )1,2-dichlorobenzene + (1 − x )1-chlorohexane} were reported in an earlier work …”

“…hexane} were reported in an earlier work. 1 The experimental data of H m E and V m E corresponding to the binary mixtures were fitted by the following variable-degree polynomials of the form where Q m E is H m E /J‚mol -1 or V m E /cm 3 ‚mol -1 . Equation 3 is a Redlich-Kister fitting polynomial, 2 and the parameters A k have been obtained by a fitting computer program which uses the least squares procedure and a Marquardt algorithm.…”

“…The excess molar enthalpies and excess molar volumes for the binary mixtures {(x)1,2-dichlorobenzene + (1 -x)benzene} and {(x)1,2-dichlorobenzene + (1 -x)1-chlorohexane} were reported in an earlier work. 1 Values of excess molar enthalpies were measured using a Calvet microcalorimeter, and excess molar volumes were determined from the densities of the pure liquids and mixtures, using a vibrating-tube densimeter. The binary experimental data were fitted using a Redlich-Kister variable-degree polynomial.…”