For the ethanol(l )/chloroform(2) system at 50°C, the activity coefficients show interior extrema with respect to composition [see Fig. 13.4(e)].
(a) Prove that the van Laar equation cannot represent such behavior.
(b) The two-parameter Margules equation can represent this behavior, but only for particular ranges of the ratio
Figure 13.4: Logarithms of the activity coefficients at 50°C for six binary liquid systems
(e)ethanol(l)/chloroform(2);
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Chapter 13 Solutions
Introduction to Chemical Engineering Thermodynamics
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