Excess molar enthalpies of binary mixtures containing dimethylcarbonate, diethylcarbonate or propylene carbonate + three chloroalkenes at 298.15 K |
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Authors: | R. Francesconi and F. Comelli |
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Affiliation: | a Dipartimento di Chimica “G. Ciamician”, Università degli Studi, via Selmi 2 I-40126 Bologna Italy b Centro di Studio per la Fisica delle Macromolecole del CNR, via Selmi 2 I-40126 Bologna Italy |
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Abstract: | Excess molar enthalpies HEm of dimethylcarbonate, diethylcarbonate or propylene carbonate + trans-1,2-dichloroethylene, + trichloroethylene, and + tetrachloroethylene, respectively have been determined at 298.15 K using an LKB flow-microcalorimeter. Experimental data have been correlated by means of the Redlich-Kister equation and adjustable parameters have been evaluated by least-squares analysis. The HEm values range from a minimum value of − 1000 J mol−1 for diethylcarbonate + trans-1,2-dichloroethylene up to a maximum of 920 J mol−1 for dimethylcarbonate + tetrachloroethylene. For each series of mixtures, a systematic increase in HEm with an increase in the number of Cl atoms in the chloroalkene molecule has been noted. The results are discussed in terms of the molecular interactions. |
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Keywords: | Binary mixtures Carbonic acid esters Excess enthalpy |
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