2 0 2009 she mou 2 journal Original Shekaari, H.[Hemayat] Mousavi, S. S.[Sedighehnaz S.] Mansoori, Y.[Yagoub] Int. J. Thermophys. 2009 2009-04-06 Thermophysical Properties of Ionic Liquid, 1-Pentyl-3-methylimidazolium chloride in Water at Different temperatures Osmotic coefficients, , electrical conductance data, ?, and refractive indices nD of aqueous solutions of ionic liquid, 1-pentyl-3-methylimidazolium chloride [PnMIm]Cl have been measured at T = (298.15, 308.15, 318.15, and 328.15) K. Measurements of osmotic coefficients were carried out by the vapor pressure osmometry method (VPO). Osmotic coefficient values show that ion-solvent interactions are stronger at low temperature. The osmotic coefficients were correlated to the Pitzer ion-interaction and modified NRTL (MNRTL) models. From these data, mean activity coefficients, +- and excess Gibbs free energies, GE have been calculated. Electrical conductance data have been applied for determination of association constants, Ka, limiting molar conductance, ?0, using low concentration Chemical model (lcCM).Calculated ion-association constant, Ka, values represent that ion-association effects increase at high temperatures which is in agreement with osmotic coefficient results. Experimental results of refractive indices for binary system are reported, and have been fitted by a polynomial expansion. Ionic liquids 1-Pentyl-3-methylimidazolium bromide Vapor pressure osmometry Osmotic coefficients Conductance Refractive index 10.1007/s10765-009-0566-6 30 499-514 1 1-methyl-3-pentyl-imidazolium chloride C9H17ClN2 1 Synthesized by the authors 1 Dried by vacuum heating 1 98 2 NMR (proton) 2 water H2O 1 2 1 1 1 Principal objective of the work RDC TRC 1/21/2009 1 Osmotic coefficient vapor pressure osmometry Liquid Direct value, X 2 1 Author 95 Liquid Gas 1 Temperature, K 2 Molality, mol/kg 1 Liquid 2 1 298.15 5 2 .014 3 1 .931 3 1 .01862 1 298.15 5 2 .0263 3 1 .889 3 1 .01778 1 298.15 5 2 .0391 3 1 .882 3 1 .01764 1 298.15 5 2 .0518 3 1 .871 3 1 .01742 1 298.15 5 2 .0634 3 1 .863 3 1 .01726 1 298.15 5 2 .084 3 1 .852 3 1 .01704 1 298.15 5 2 .1007 4 1 .841 3 1 .01682 1 298.15 5 2 .1369 4 1 .821 3 1 .01642 1 298.15 5 2 .1784 4 1 .805 3 1 .0161 1 298.15 5 2 .2198 4 1 .797 3 1 .01594 1 298.15 5 2 .2765 4 1 .79 3 1 .0158 1 298.15 5 2 .3517 4 1 .781 3 1 .01562 1 298.15 5 2 .4043 4 1 .768 3 1 .01536 1 298.15 5 2 .5014 4 1 .75 3 1 .015 1 298.15 5 2 .5758 4 1 .735 3 1 .0147 1 298.15 5 2 .8464 4 1 .722 3 1 .01444 1 298.15 5 2 1.0016 5 1 .71 3 1 .0142 1 298.15 5 2 1.3758 5 1 .697 3 1 .01394 1 298.15 5 2 1.7972 5 1 .687 3 1 .01374 1 308.15 5 2 .014 3 1 .938 3 1 .01876 1 308.15 5 2 .0263 3 1 .905 3 1 .0181 1 308.15 5 2 .0391 3 1 .887 3 1 .01774 1 308.15 5 2 .0518 3 1 .878 3 1 .01756 1 308.15 5 2 .0634 3 1 .868 3 1 .01736 1 308.15 5 2 .084 3 1 .858 3 1 .01716 1 308.15 5 2 .1007 4 1 .845 3 1 .0169 1 308.15 5 2 .1369 4 1 .829 3 1 .01658 1 308.15 5 2 .1784 4 1 .812 3 1 .01624 1 308.15 5 2 .2198 4 1 .803 3 1 .01606 1 308.15 5 2 .2765 4 1 .795 3 1 .0159 1 308.15 5 2 .3517 4 1 .788 3 1 .01576 1 308.15 5 2 .4043 4 1 .78 3 1 .0156 1 308.15 5 2 .5014 4 1 .753 3 1 .01506 1 308.15 5 2 .5758 4 1 .742 3 1 .01484 1 308.15 5 2 .8464 4 1 .726 3 1 .01452 1 308.15 5 2 1.0016 5 1 .715 3 1 .0143 1 308.15 5 2 1.3758 5 1 .704 3 1 .01408 1 308.15 5 2 1.7972 5 1 .691 3 1 .01382 1 318.15 5 2 .014 3 1 .941 3 1 .01882 1 318.15 5 2 .0263 3 1 .911 3 1 .01822 1 318.15 5 2 .0391 3 1 .903 3 1 .01806 1 318.15 5 2 .0518 3 1 .885 3 1 .0177 1 318.15 5 2 .0634 3 1 .878 3 1 .01756 1 318.15 5 2 .084 3 1 .865 3 1 .0173 1 318.15 5 2 .1007 4 1 .854 3 1 .01708 1 318.15 5 2 .1369 4 1 .845 3 1 .0169 1 318.15 5 2 .1784 4 1 .831 3 1 .01662 1 318.15 5 2 .2198 4 1 .822 3 1 .01644 1 318.15 5 2 .2765 4 1 .803 3 1 .01606 1 318.15 5 2 .3517 4 1 .794 3 1 .01588 1 318.15 5 2 .4043 4 1 .784 3 1 .01568 1 318.15 5 2 .5014 4 1 .76 3 1 .0152 1 318.15 5 2 .5758 4 1 .748 3 1 .01496 1 318.15 5 2 .8464 4 1 .735 3 1 .0147 1 318.15 5 2 1.0016 5 1 .723 3 1 .01446 1 318.15 5 2 1.3758 5 1 .711 3 1 .01422 1 318.15 5 2 1.7972 5 1 .697 3 1 .01394 1 328.15 5 2 .014 3 1 .949 3 1 .01898 1 328.15 5 2 .0263 3 1 .923 3 1 .01846 1 328.15 5 2 .0391 3 1 .908 3 1 .01816 1 328.15 5 2 .0518 3 1 .897 3 1 .01794 1 328.15 5 2 .0634 3 1 .886 3 1 .01772 1 328.15 5 2 .084 3 1 .87 3 1 .0174 1 328.15 5 2 .1007 4 1 .866 3 1 .01732 1 328.15 5 2 .1369 4 1 .849 3 1 .01698 1 328.15 5 2 .1784 4 1 .837 3 1 .01674 1 328.15 5 2 .2198 4 1 .828 3 1 .01656 1 328.15 5 2 .2765 4 1 .809 3 1 .01618 1 328.15 5 2 .3517 4 1 .799 3 1 .01598 1 328.15 5 2 .4043 4 1 .79 3 1 .0158 1 328.15 5 2 .5014 4 1 .771 3 1 .01542 1 328.15 5 2 .5758 4 1 .756 3 1 .01512 1 328.15 5 2 .8464 4 1 .739 3 1 .01478 1 328.15 5 2 1.0016 5 1 .73 3 1 .0146 1 328.15 5 2 1.3758 5 1 .718 3 1 .01436 1 328.15 5 2 1.7972 5 1 .704 3 1 .01408 2 1 1 1 Principal objective of the work RDC TRC 1/21/2009 1 Molar conductivity, S*m2/mol Direct current cell with electrodes Liquid Direct value, X 1 Author 95 Liquid Pressure, kPa 101 3 1 Temperature, K 2 Amount concentration (molarity), mol/dm3 1 Liquid 1 328.15 5 2 .000588 3 1 .01187 5 1 .0002374 1 328.15 5 2 .001076 4 1 .011762 5 1 .00023524 1 328.15 5 2 .001612 4 1 .011675 5 1 .0002335 1 328.15 5 2 .002109 4 1 .011641 5 1 .00023282 1 328.15 5 2 .002949 4 1 .011595 5 1 .0002319 1 328.15 5 2 .003721 4 1 .011557 5 1 .00023114 1 328.15 5 2 .004608 4 1 .011463 5 1 .00022926 1 328.15 5 2 .005897 4 1 .011341 5 1 .00022682 1 328.15 5 2 .007087 4 1 .011127 5 1 .00022254 1 328.15 5 2 .008632 4 1 .010973 5 1 .00021946 1 328.15 5 2 .010343 5 1 .010784 5 1 .00021568 1 328.15 5 2 .012292 5 1 .010569 5 1 .00021138 1 328.15 5 2 .015387 5 1 .010478 5 1 .00020956 1 328.15 5 2 .017876 5 1 .010359 5 1 .00020718 1 328.15 5 2 .020113 5 1 .010293 5 1 .00020586 1 328.15 5 2 .02273 5 1 .010107 5 1 .00020214 1 318.15 5 2 .000273 3 1 .0115471 6 1 .000230942 1 318.15 5 2 .000592 3 1 .0113693 6 1 .000227386 1 318.15 5 2 .001207 4 1 .011221 6 1 .00022442 1 318.15 5 2 .002002 4 1 .0111247 6 1 .000222494 1 318.15 5 2 .002757 4 1 .0109817 6 1 .000219634 1 318.15 5 2 .003483 4 1 .0108015 6 1 .00021603 1 318.15 5 2 .004458 4 1 .0107335 6 1 .00021467 1 318.15 5 2 .005601 4 1 .010649 5 1 .00021298 1 318.15 5 2 .007348 4 1 .0104919 6 1 .000209838 1 318.15 5 2 .008904 4 1 .0103795 6 1 .00020759 1 318.15 5 2 .010517 5 1 .010296 6 1 .00020592 1 318.15 5 2 .012404 5 1 .0101974 6 1 .000203948 1 318.15 5 2 .014778 5 1 .0100615 6 1 .00020123 1 318.15 5 2 .016606 5 1 .0099955 5 1 .00019991 1 318.15 5 2 .019595 5 1 .0098894 5 1 .000197788 1 318.15 5 2 .022411 5 1 .0097761 5 1 .000195522 1 318.15 5 2 .025446 5 1 .009663 4 1 .00019326 1 318.15 5 2 .028969 5 1 .0095269 5 1 .000190538 1 318.15 5 2 .033178 5 1 .0093855 5 1 .00018771 1 318.15 5 2 .037786 5 1 .0092411 5 1 .000184822 1 308.15 5 2 .000752 3 1 .0099323 5 1 .000198646 1 308.15 5 2 .001643 4 1 .009749 5 1 .00019498 1 308.15 5 2 .002686 4 1 .0096351 5 1 .000192702 1 308.15 5 2 .00347 4 1 .0095614 5 1 .000191228 1 308.15 5 2 .004191 4 1 .0095949 5 1 .000191898 1 308.15 5 2 .005081 4 1 .0095317 5 1 .000190634 1 308.15 5 2 .006215 4 1 .0094452 5 1 .000188904 1 308.15 5 2 .007646 4 1 .0093704 5 1 .000187408 1 308.15 5 2 .009172 4 1 .009268 4 1 .00018536 1 308.15 5 2 .011021 5 1 .0091675 5 1 .00018335 1 308.15 5 2 .012685 5 1 .0091161 5 1 .000182322 1 308.15 5 2 .01447 5 1 .0090623 5 1 .000181246 1 308.15 5 2 .01625 5 1 .0090172 5 1 .000180344 1 308.15 5 2 .017994 5 1 .0089495 5 1 .00017899 1 308.15 5 2 .019859 5 1 .0088945 5 1 .00017789 1 308.15 5 2 .022534 5 1 .0088058 5 1 .000176116 1 308.15 5 2 .025491 5 1 .0087299 5 1 .000174598 1 308.15 5 2 .028845 5 1 .0086301 5 1 .000172602 1 308.15 5 2 .032453 5 1 .008558 5 1 .00017116 1 308.15 5 2 .036305 5 1 .0084625 5 1 .00016925 1 308.15 5 2 .040729 5 1 .0083658 5 1 .000167316 1 308.15 5 2 .046028 5 1 .0081958 5 1 .000163916 1 308.15 5 2 .04936 5 1 .0081448 5 1 .000162896 1 298.15 5 2 .000693 3 1 .008706 5 1 .00017412 1 298.15 5 2 .001453 4 1 .0086629 5 1 .000173258 1 298.15 5 2 .002097 4 1 .0086326 5 1 .000172652 1 298.15 5 2 .002732 4 1 .0086212 5 1 .000172424 1 298.15 5 2 .004637 4 1 .008595 4 1 .0001719 1 298.15 5 2 .006272 4 1 .008578 4 1 .00017156 1 298.15 5 2 .007754 4 1 .0085176 5 1 .000170352 1 298.15 5 2 .010226 5 1 .0084053 5 1 .000168106 1 298.15 5 2 .012833 5 1 .008324 5 1 .00016648 1 298.15 5 2 .017749 5 1 .0081651 5 1 .000163302 1 298.15 5 2 .021857 5 1 .0080443 5 1 .000160886 1 298.15 5 2 .027042 5 1 .0079329 5 1 .000158658 1 298.15 5 2 .032054 5 1 .0078281 5 1 .000156562 1 298.15 5 2 .036797 5 1 .0078029 5 1 .000156058 1 298.15 5 2 .041319 5 1 .0077162 5 1 .000154324 1 298.15 5 2 .04635 5 1 .0076273 5 1 .000152546 1 298.15 5 2 .051824 5 1 .0075182 5 1 .000150364 2 1 1 1 Principal objective of the work RDC TRC 1/21/2009 1 Refractive index (Na D-line) Standard Abbe refractometry Liquid Direct value, X 1 Author Liquid Pressure, kPa 101 3 1 Temperature, K 2 Molality, mol/kg 1 Liquid 2 1 298.15 5 2 .014 3 1 1.3331 5 1 .0001 1 298.15 5 2 .0263 3 1 1.3334 5 1 .0001 1 298.15 5 2 .0391 3 1 1.3338 5 1 .0001 1 298.15 5 2 .0518 3 1 1.3342 5 1 .0001 1 298.15 5 2 .0634 3 1 1.3344 5 1 .0001 1 298.15 5 2 .084 3 1 1.3351 5 1 .0001 1 298.15 5 2 .1007 4 1 1.3358 5 1 .0001 1 298.15 5 2 .1369 4 1 1.3367 5 1 .0001 1 298.15 5 2 .1784 4 1 1.3379 5 1 .0001 1 298.15 5 2 .2198 4 1 1.3392 5 1 .0001 1 298.15 5 2 .2765 4 1 1.3408 5 1 .0001 1 298.15 5 2 .3517 4 1 1.343 5 1 .0001 1 298.15 5 2 .4043 4 1 1.3443 5 1 .0001 1 298.15 5 2 .5014 4 1 1.347 5 1 .0001 1 298.15 5 2 .5758 4 1 1.3489 5 1 .0001 1 298.15 5 2 .8464 4 1 1.3558 5 1 .0001 1 298.15 5 2 1.0016 5 1 1.3596 5 1 .0001 1 298.15 5 2 1.3758 5 1 1.3679 5 1 .0001 1 298.15 5 2 1.7972 5 1 1.3764 5 1 .0001 1 308.15 5 2 .014 3 1 1.3318 5 1 .0001 1 308.15 5 2 .0263 3 1 1.3321 5 1 .0001 1 308.15 5 2 .0391 3 1 1.3324 5 1 .0001 1 308.15 5 2 .0518 3 1 1.3328 5 1 .0001 1 308.15 5 2 .0634 3 1 1.3331 5 1 .0001 1 308.15 5 2 .084 3 1 1.3339 5 1 .0001 1 308.15 5 2 .1007 4 1 1.3344 5 1 .0001 1 308.15 5 2 .1369 4 1 1.3357 5 1 .0001 1 308.15 5 2 .1784 4 1 1.3367 5 1 .0001 1 308.15 5 2 .2198 4 1 1.3378 5 1 .0001 1 308.15 5 2 .2765 4 1 1.3397 5 1 .0001 1 308.15 5 2 .3517 4 1 1.3416 5 1 .0001 1 308.15 5 2 .4043 4 1 1.343 5 1 .0001 1 308.15 5 2 .5014 4 1 1.3457 5 1 .0001 1 308.15 5 2 .5758 4 1 1.3475 5 1 .0001 1 308.15 5 2 .8464 4 1 1.3547 5 1 .0001 1 308.15 5 2 1.0016 5 1 1.3579 5 1 .0001 1 308.15 5 2 1.3758 5 1 1.3658 5 1 .0001 1 308.15 5 2 1.7972 5 1 1.3745 5 1 .0001 1 318.15 5 2 .014 3 1 1.3302 5 1 .0001 1 318.15 5 2 .0263 3 1 1.3305 5 1 .0001 1 318.15 5 2 .0391 3 1 1.3308 5 1 .0001 1 318.15 5 2 .0518 3 1 1.3313 5 1 .0001 1 318.15 5 2 .0634 3 1 1.3316 5 1 .0001 1 318.15 5 2 .084 3 1 1.3322 5 1 .0001 1 318.15 5 2 .1007 4 1 1.3327 5 1 .0001 1 318.15 5 2 .1369 4 1 1.3336 5 1 .0001 1 318.15 5 2 .1784 4 1 1.3349 5 1 .0001 1 318.15 5 2 .2198 4 1 1.3359 5 1 .0001 1 318.15 5 2 .2765 4 1 1.3377 5 1 .0001 1 318.15 5 2 .3517 4 1 1.3397 5 1 .0001 1 318.15 5 2 .4043 4 1 1.3411 5 1 .0001 1 318.15 5 2 .5014 4 1 1.3437 5 1 .0001 1 318.15 5 2 .5758 4 1 1.3457 5 1 .0001 1 318.15 5 2 .8464 4 1 1.3523 5 1 .0001 1 318.15 5 2 1.0016 5 1 1.3557 5 1 .0001 1 318.15 5 2 1.3758 5 1 1.3639 5 1 .0001 1 318.15 5 2 1.7972 5 1 1.3721 5 1 .0001 1 328.15 5 2 .014 3 1 1.3282 5 1 .0001 1 328.15 5 2 .0263 3 1 1.3284 5 1 .0001 1 328.15 5 2 .0391 3 1 1.3288 5 1 .0001 1 328.15 5 2 .0518 3 1 1.3291 5 1 .0001 1 328.15 5 2 .0634 3 1 1.3294 5 1 .0001 1 328.15 5 2 .084 3 1 1.3305 5 1 .0001 1 328.15 5 2 .1007 4 1 1.3309 5 1 .0001 1 328.15 5 2 .1369 4 1 1.3316 5 1 .0001 1 328.15 5 2 .1784 4 1 1.3328 5 1 .0001 1 328.15 5 2 .2198 4 1 1.3339 5 1 .0001 1 328.15 5 2 .2765 4 1 1.3356 5 1 .0001 1 328.15 5 2 .3517 4 1 1.3376 5 1 .0001 1 328.15 5 2 .4043 4 1 1.3389 5 1 .0001 1 328.15 5 2 .5014 4 1 1.3419 5 1 .0001 1 328.15 5 2 .5758 4 1 1.344 5 1 .0001 1 328.15 5 2 .8464 4 1 1.3505 5 1 .0001 1 328.15 5 2 1.0016 5 1 1.3537 5 1 .0001 1 328.15 5 2 1.3758 5 1 1.3619 5 1 .0001 1 328.15 5 2 1.7972 5 1 1.3697 5 1 .0001