Following are VLE data for the system acetronitrile (1)/benzene (2) at 45oC (extracted from I brown and F smith J. Chem, Vol 8 pg 62, 1955) P x1 y1 (29.819 0.0000 0.0000) (31.957 0.0455 0.1056) (33.553 0.0940 0.1818) (35.285 0.1829 0.2783) (36.457 0.2909 0.3607) (36.996 0.3980 0.4274) (37.068 0.5069 0.4885) (36.978 0.5458 0.5098) (36.778 0.5946 0.5375) (35.792 0.7206 0.6157) (34.372 0.8145 0.6913) (32.331 0.8972 0.7869) (30.038 0.9573 0.8916) (27.778 1.0000 1.0000)

The data are well correlated by the the three parameter Margules equation (See Problem 13.37)

a) Basing calculation on equation (13.24), find the values of parameters A₁₂, A₂₁, and C that provide the best fit of G^E/RT to the data.

b) Prepare a plot of , and vs. showing both the correlation and experimental values.

c) Prepare a P-x-y diagram [see Figure 13.8(a)} that compares the experimental data with the correlation determined in (a).