Chapter 13, Problem 13.51P

Problems 13.43 through 13.54 require parameter values for the Wilson or NRTL equation for liquid-phase activity coefficients. Table 13.10 gives parameter values for both equations. Antoine equations for vapor pressure are given in Table B.2, Appendix B.
13.51. For the acetone(1)/methanol(2)/waler(3), system, based on Eq. (13.19) and the Wilson equation, make the following calculations:

1. BUBL P: t = 65°C, x₁= 0.3, x₂= 0.4.
2. DEW P: t = 65° C, y₁= 0.3, y₂ = 0.4.
3. P.T - flash: t = 65°C, $P=\frac{1}{2}\left(P_{bubble}+P_{dew}\right),z_1=0.3,z_2=0.3$ .

Table 13.10: Parameter Values for the Wilson and NRTL Equations Parameters a₁₂, a₂₁, b₁₂ and b₂₁ have units of cal+mol-1 and V₁ and V₂ have units of cm³+ mol-1

Values arc those recommended by Gmehling el al., Vapor-Liquid Equilibrium Data Collection, Chemistry Data Scries, vol. 1. parts la. lb. 2c. and 2c. DECHEM A. Franklurt/Main. 1981-1988.