Volumetric behaviour of binary liquid systems composed of toluene, isooctane, and methyl tert-butyl ether at temperatures from (298.15 to 328.15) K

The densities and speeds of sound of (toluene + isooctane), (MTBE + toluene), and (MTBE + isooctane) were measured at four temperatures from (298.15 to 328.15) K, and the respective values of excess volumes VmE and adiabatic compressibility κS were calculated. The VmE and κS values were fitted to the fourth-order Redlich–Kister equation. The VmE values for (MTBE + toluene) are negative and decreasing with increasing temperature. The other systems show positive VmE with comparatively small temperature dependence.