caa a22 4500 44532774X CHVBK 20180317142726.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s10953-011-9740-0 doi (NATIONALLICENCE)springer-10.1007/s10953-011-9740-0 Apparent Molar Volume and Isentropic Compressibility for the Binary Systems {Methyltrioctylammonium Bis(trifluoromethylsulfonyl)imide + Methyl Acetate or Methanol} and (Methanol + Methyl Acetate) at T =298.15, 303.15, 308.15 and 313.15 K and Atmospheric Pressure [Elektronische Daten] [Indra Bahadur, Nirmala Deenadayalu] The densities and speeds of sound for binary mixtures containing the solute ionic liquid (IL) methyltrioctylammonium bis(trifluoromethylsulfonyl)imide ([MOA]+[Tf2N]−), solute/solvent methanol, and solvent methyl acetate have been measured at 298.15, 303.15, 308.15 and 313.15K at atmospheric pressure. The binary mixtures studied are ([MOA]+[Tf2N]−+ methyl acetate or methanol), and (methanol+ methyl acetate). The apparent molar volume, V φ and the apparent molar isentropic compressibility, k φ , have been evaluated from the experimental density and speed of sound data, respectively. The parameters of a Redlich-Mayer type equation were fitted to the apparent molar volume and apparent molar isentropic compressibility data. The apparent molar volume and apparent molar isentropic compressibility at infinite dilution, $V_{\phi}^{0}$ and $k_{\phi}^{0}$ , respectively, of the binary solutions have also been calculated at each temperature. The infinite dilution apparent molar volume indicates that intermolecular interactions for (IL+ methyl acetate) mixtures are stronger than for (IL+ methanol) mixtures at all temperatures except at 298.15K, and that $V_{\phi}^{0}$ for the (IL+ methyl acetate or methanol) binary systems increases with an increase in temperature. For the (methanol+ methyl acetate) system the intermolecular interaction are weaker and $V_{\phi}^{0}$ also increases with an increase in temperature. Values of the infinite dilution apparent molar expansibility, $E_{\phi}^{0}$ , indicate that the interaction between (IL+ methyl acetate) is greater than for (IL+ methanol) and (methanol+ methyl acetate). The isentropic compressibilities increase with an increase in temperature for each binary system. At a fixed temperature the isentropic compressibilities also increase with an increase in concentration of the solute for the systems (IL+ methyl acetate) and (methanol+ methyl acetate), but decrease for the system (IL+ methanol). Negative values of $k_{\phi}^{0}$ for ([MOA]+[Tf2N]−+ methyl acetate or methanol) and (methanol+ methyl acetate) mixtures can be attributed to the predominance of a penetration effect resulting in greater resistance to compression. Springer Science+Business Media, LLC, 2011 Ionic liquid nationallicence Methanol nationallicence Methyl acetate nationallicence Apparent molar volumes nationallicence Redlich-Mayer type equation nationallicence Isentropic compressibility nationallicence Speed of sound nationallicence Bahadur Indra Department of Chemistry, Durban University of Technology, P.O. Box 1334, 4000, Durban, South Africa aut Deenadayalu Nirmala Department of Chemistry, Durban University of Technology, P.O. Box 1334, 4000, Durban, South Africa aut Journal of Solution Chemistry Springer US; http://www.springer-ny.com 40/9(2011-09-01), 1528-1543 0095-9782 40:9<1528 2011 40 10953 https://doi.org/10.1007/s10953-011-9740-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10953-011-9740-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bahadur Indra Department of Chemistry, Durban University of Technology, P.O. Box 1334, 4000, Durban, South Africa aut NATIONALLICENCE 700 1- Deenadayalu Nirmala Department of Chemistry, Durban University of Technology, P.O. Box 1334, 4000, Durban, South Africa aut NATIONALLICENCE 773 0- Journal of Solution Chemistry Springer US; http://www.springer-ny.com 40/9(2011-09-01), 1528-1543 0095-9782 40:9<1528 2011 40 10953 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer