Monday, February 12, 2007

HW #5, P12.22 - Multicomponent Flash Using the Wilson Equation - 20 pts

For the acetone(1) / methanol(2) / water(3) system, based on the Modified raoult's law and the Wilson Equation, make the following calculations :

a.) Bubble point temperature for P = 101.33 kPa, x1 = 0.30 and x2 = 0.40.
b.) Dew point temperature for P = 101.33 kPa, y1 = 0.30 and y2 = 0.40.
c.) PT Flash: Given P = 101.33 kPa, T = (Tbub+Tdew)/2, and z1 = 0.30 and z2 = 0.20.

3 comments:

Anonymous said...

what do i use in order to use wilson's equation. what do i use for the data or the a values? Or maybe i'm on the wrong track

Anonymous said...

maybe all the data is given on page 474? If all pairs of data are given for the three species can I use these? I thought the data on 474 was for those binary systems but maybe i was wrong and we can use these to get all the a values for this bigger system too?

Dr. B said...

Brendan 7:35 & 7:41:
You are definitely on the right track.
Use the data on pg 474 for each binary pair: 1-2, 1-3, 2-3.
The lambda{i,j} matrix is symmetric with 1's on the diagonal.
Let me know if you have any other problems.