Thermodynamic properties of (a pentyl ester + an-alkane). XIV. The Hand Vfor (an ester + an-alkane)

Thermodynamic properties of (an ester+an alkane). XVI. Experimental HmE and VmE values and a new correlation method for (an alkyl ethanoate+an n-alkane) at 318.15 K

“…The enthalpies are correlated as follows, presuming that the energy of the mixture is due largely, as proposed in previous works [4][5][6], to the contact areas between the molecules of the compounds involved, both in the final mixture and in the pure components. Therefore, in a similar way as for volumes, correlation of the enthalpies can occur by identifying k with a quotient of q i , estimated as the sum of the group area parameters Q k by q i ¼ P k t ðiÞ k Q k .…”

“…To date, some quantities of mixture have been determined experimentally [1][2][3][4][5][6] by us, such as enthalpies H E m and volumes V E m , but always at a constant temperature of 298.15 K, and the isobaric (vapor + liquid) equilibria (VLE) [7,8], of alkyl ethanoates with n-alkanes. Both for ethanoates and for any other ester, generically qualified as R 1 COOR 2 , the systems studied in this work proved to be endothermic processes, where the quantities associated with the interaction energy, such as H E m , gradually diminish with increasing length of the acid chain R 1 or alkanolic chain R 2 of the ester.…”

Thermodynamic properties of (an ester+an alkane). XVII. Experimental and values for (an alkyl propanoate+an alkane) at 318.15K

“…Here, among other factors, variations in some properties of the mixture with temperature are analysed in order to interpret correctly the mixing process and to proceed to formulating the model. In previous works [1][2][3][4][5][6][7], mixing quantities enthalpies H E m and volumes V E m have been determined at T = 298.15 K for binary systems of propanoates (methyl to pentyl) with several alkanes. Also, in the literature (vapour + liquid) equilibria (VLE) have been found for mixtures of (methyl propanoate + heptane) [8] and (propyl propanoate + heptane or nonane) [9].…”

Topological and thermodynamic investigations of molecular interactions in binary mixtures: Molar excess volumes and molar excess enthalpies

“…A number of experimental as well as theoretical studies on thermodynamic properties for alkyl ester with alkanes [1][2][3][4][5][6][7][8][9], aromatic hydrocarbons [8][9][10][11][12][13][14][15][16][17], alcohols [18,19], chloroalkane [20] and acetonitrile [16,21] have been reported in literature. Among them, systemic data for alkyl ester + aromatic polar solvent are relatively rare [10][11][12][13][14][15][16][17].…”

“…Among them, systemic data for alkyl ester + aromatic polar solvent are relatively rare [10][11][12][13][14][15][16][17]. Alkyl esters are characterized by dipole-dipole interactions in the pure state [1][2][3]. The degree and strength of dipole-dipole interactions decreases with the increasing size of alkyl group in the esters.…”