Thermodynamic properties of (an ethyl ester+a branched alkane). XV. HmE and VmE values for (an ester+an alkane)

Thermodynamic study of (alkyl esters +α,ω-alkyl dihalides) I: HmE and Ortega1, Marrero2, Toledo3 et al. 2005The Journal of Chemical Thermodynamics154290View full textAdd to dashboardCite

“…This equation has been used in recent papers [10][11][12] by our group with the aim of obtaining a meaning for the parameters it contains. Hence, when the excess volumes of a binary mixture are correlated, the k parameter of equation (1) is identified with the quotient of the molar volumes of the pure substances in the mixture at the same temperature as the V E m , using in this case the notation k v for this parameter, so that k v ¼ V m;2 =V m;1 .…”

“…From the representations one can observe that in order to quantitatively analyse the results these should be separated into three groups: the first composed of binary mixtures corresponding to u = 1 and v P 3, that resulted in endothermic mixing processes, H E m > 0, accompanied by dilatation, V E m > 0, a second group, corresponding to u P 3, v P 4 of exothermic mixtures, H E m < 0, with contraction V E m < 0, and, finally, a wide group of systems corresponding to all the mixtures not included in the previous classification, exothermic mixtures accompanied by (1), doing x = 0.5, to give the following general expression: The H E m values for some of the mixtures chosen here, more specifically those of ethyl ethanoate + 1,2-dichloroethane, or +1,4-dichlorobutane, or +1,6-dichlorohexane, are given in the literature [10] and figure 1(b) compares these with our experimental values. These values almost coincide in the case of the ethyl ethanoate + 1,2-dichloroethane mixture, but differences are found for the other two mixtures, possibly due to the different sensitivities of the calorimeters used in both works, since measurements are in the order of 100 J AE mol À1 .…”

“…Studies carried out in our laboratory with mixtures of ethyl esters with monochloroalkanes are also recorded in the literature [8,9]. However, for the systematization of these studies, experimental values are required and a preliminary analysis of primary systems, 0021 such as those corresponding to mixtures of a,xdihaloalkanes + alkanes [1][2][3], and esters + alkanes [10][11][12], requiring exhaustive work by our research team. Therefore, the present work focuses on studies of binary mixtures of ethyl esters + a,x-dichloroalkanes, providing data of H E m and V E m for a set of 25 binary mixtures, which will be used to complete contributions made in previous works and to verify the structural model proposed for other similar binary systems.…”

Multiproperty Correlation of Experimental Data of the Binaries Propyl Ethanoate + Alkanes (Pentane to Decane). New Experimental Information for Vapor–Liquid Equilibrium and Mixing Properties

“…It is important to contribute new experimental data which, in addition to the above, enable knowledge of the capacity of the model to represent several of the systems' properties. In this line, studies on methyl 1 and ethyl 2,3 ethanoates have been published, and in this work the properties of mixtures of propyl ethanoate with six alkanes, from pentane to decane, are presented. Specifically 4,5 at two of the indicated temperatures, 298 K and 318 K; isobaric VLE data of propyl ethanoate + (C 7 ,C 9 ) have also been published previously.…”

Correlation and prediction of mixing thermodynamic properties of ester-containing systems: Ester+alkane and ester+ester binary systems and the ternary dodecane+ethyl pentanoate+ethyl ethanoate

“…Previous work by our group reported the behavior of various binary systems of esters with alkanes [1][2][3], alkanols [4][5][6] and haloalkanes [7][8][9]. It is especially interesting to quantify the solvent capacity of esters with different solutes, since these are often present as solutions in some sectors of the chemical industry, such as pharmacology and cosmetics.…”