The following is a set of activity-coefficient data for a binary liquid system as determined from VLE data:

Inspection of these experimental values suggests that they are noisy, but the question is whether they are consistent, and therefore possibly on average correct.
(a) Find experimental values for G^E∕RT and plot them along with the experimental values of ln γ₁ and ln γ₂ on a single graph.
(b) Develop a valid correlation for the composition dependence of G^E∕RT and show lines on the graph of part (a) that represent this correlation for all three of the quantities plotted there.
(c) Apply the consistency test described in Ex. 13.4 to these data, and draw a conclusion with respect to this test.

(c) Ex. 13.4

VLE data for diethyl ketone(1)/n-hexane(2) at 65°C as reported by Maripuri and Ratcliff¹⁴ are given in the first three columns of Table 13.5. Reduce this set of data.

Table 13.5

Transcribed Image Text:

Y1 Y2 YI Y2 0.0523 1.202 1.002 0.5637 1.120 1.102 0.1299 1.307 1.004 0.6469 0.7832 1.076 1.170 0.2233 1.295 1.006 1.032 1.298 1.393 0.2764 1.228 1.024 0.8576 1.016 0.3482 1.234 1.022 0.9388 1.001 1.600 0.4187 1.180 0.9813 1.049 1.092 1.003 1.404 0.5001 1.129