The data in Table 10.2 are experimental values of VE for binary liquid mixtures of 1,3-dioxolane(1) and isooctane(2) at 298. 15 K and 1(atm). (a) Determine from the data numerical values of parameters a, b, and c in the correlating equation: VE = x1x2(a + bx1+ cx1^2). (b) Determine from the results of part (a) the maximum value of VE. At what value of X1 does this occur? (c) Determine from the results of part (a) expressions for VE 1 and VE 2. Prepare a plot of these quantities vs. X1, and discuss its features. Table 10.2: Excess Volumes for 1,3-Dioxolane(1)/Isooctane(2) at 298.15 K VE /10-3 cm?-mol-1 Table :

Xi

0.02715 0.09329 0.17490 0.32760 0.40244 0.56689 0.63128 0.66233 0.69984 0.72792 0.77514 0.79243 0.82954 0.86835 0.93287 0.98233

VE/10^-3

87.5 265.6 417.4 534.5 531.7 421.1 347.1 321.7 276.4 252.9 190.7 178.1 138.4 98.4 37.6 10.0