Mastering ChE 2011 Process Analysis: Extra Credit for Problem #3.2 Explained

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SUMMARY

The forum discussion centers on problem #3.2 from the ChE 2011 Process Analysis course, which involves calculating the vapor and liquid fractions and their compositions from a feed stream of 22 mole% methanol and 78 mole% water at equilibrium conditions of 75°C and 760 mm Hg. The feed flowrate is specified as 100 lb-mole/hr, with equilibrium constants Km=1.49 and Kw=0.38. The user expresses difficulty in understanding the material, particularly due to the professor's teaching effectiveness and references the textbook "Material Balances For Chemical Engineers" by Ramon L. Cerro, specifically Chapter 5.

PREREQUISITES
  • Understanding of phase equilibrium concepts in chemical engineering
  • Familiarity with material balance calculations
  • Knowledge of vapor-liquid equilibrium and Raoult's Law
  • Proficiency in using equilibrium constants for component distribution
NEXT STEPS
  • Study vapor-liquid equilibrium calculations using Raoult's Law
  • Review material balance techniques in chemical engineering
  • Practice problems from "Material Balances For Chemical Engineers" by Ramon L. Cerro
  • Explore software tools for process simulation, such as Aspen Plus or HYSYS
USEFUL FOR

Chemical engineering students, particularly those enrolled in process analysis courses, and educators seeking to enhance their teaching methods in material balance and phase equilibrium topics.

Smx_Drummerboy
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Hello, this is my first post in these forums, hopefully it proves to be helpful. I recently just took my 4th exam in my ChE 2011 Process Analysis class. I didn't do good on it at all. The good news is, the professor is giving us a chance to get some extra credit.

For Extra Credit:
Consider problem No. 3.2. There is an effort in this problem. What is it? How can you find the correct solution?

#3.2
Find the fraction vapor and *liquid and the composition of each stream.
* Here I assume he means the vapor and liquid composition, the way I typed it is how it appeared on the test.

Info for the problem:
A feed stream containing 22 mole% methanol and 78 mole % water is brought to equilibrium at 75 deg C and 760 mm Hg. The feed flowrate is 100lb-mole/hr.
Km=1.49=Xm/Ym, Kw=.38=Xw/Yw

This is about all that is given, the only other thing is a diagram with a system containing a feed stream and then an exit liquid and exit vapor stream.

I have struggled with this class all semester and still have yet to understand it. My professor isn't that great of a teacher. The book we are learning out of is Material Balances For Chemical Engineers by Ramon L. Cerro if that helps, this is Chapter 5 material.

Any help or input anyone can offer is more than I can say my professor has given and would be appreciated more than you can imagine.

Thanks
 
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There is a correction apparently which helps a little...Instead of effort, he meant to type error. Maybe this will give someone and idea. I'm at a loss.