Excess volumes of octamethylcyclotetrasiloxane + carbon tetrachloride

Abstract

Densities were measured at approximately 5 K intervals for pure octamethylcyclotetrasiloxane ( omcts) between 298.88 and 424.10 K, for pure carbon tetrachloride between 252.51 and 345.42 K, and for three mixtures: mole fraction x = 0.2491 of CCl 4 between 296.77 and 374.52 K, x = 0.5012 between 297.14 and 355.03 K, and x = 0.7493 between 297.38 and 347.71 K. Excess volumes for the three mixtures were calculated at 5 K intervals over the range 298.15 to 348.15 K and compared with some theoretical predictions. An empirical factor ζ, a correction to the unlike pair diameter σ 12, is introduced and shown to be a reasonable means for improving the agreement.