Evaluation of fugacity (Chemical Engineering)

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Discussion Overview

The discussion revolves around the evaluation of fugacity for liquids and gases in the context of a chemical engineering course. Participants are examining a specific equation related to fugacity and its potential errors, as well as referencing relevant textbooks and methods for finding compressibility factors.

Discussion Character

  • Homework-related
  • Technical explanation

Main Points Raised

  • One participant questions the validity of an equation related to fugacity, suggesting it may evaluate to ln(0), which would imply infinity.
  • Another participant suggests checking the textbook, specifically Chapter 11 of Smith, Van Ness, and Abbott, for clarification on the equation.
  • A different participant mentions that their friend found an answer related to a compressibility factor, Z, and suggests that it is a function of the reduced pressure, Pr.
  • There is a reference to the Lee-Kesler correlations, which are indicated to be found in the same textbook and require double interpolation for accurate use.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the correctness of the equation in question. There are multiple viewpoints regarding the use of textbooks and methods for evaluating fugacity, indicating that the discussion remains unresolved.

Contextual Notes

The discussion includes references to specific equations and methods that may depend on particular assumptions or definitions not fully explored in the thread.

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Homework Statement



I was revising the topic on the evaluation of fugacity of liquids and gases for my chemical engineering course, when I ran into an equation which I think, may be wrong as I think it may evaluate to ln0, which is infinity.

Here is a snapshot of the equation:

vo23w7.jpg


The equation in question is the integral just above the words "GRAPHICAL INTEGRATION".

May I know if the equation is erroneous?

Thanks!

Homework Equations



NIL

The Attempt at a Solution


NIL
 
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Have you looked through your textbook? It would be in Chapter 11 of Smith, Van Ness, and Abbott if I am not mistaken
 
Maylis said:
Have you looked through your textbook? It would be in Chapter 11 of Smith, Van Ness, and Abbott if I am not mistaken

Hi Maylis. I think my friend got his answer already~ :) He said something about using the table, and that the Z thingy is a function of Pr. Haha. Is he correct? I don't have the textbook, perhaps I can ask him to borrow it at the library. :)
 
He may be speaking about the Lee-Kesler correlations, which are found in tables in the same textbook mentioned. Those tables require the use of double interpolation, so be methodical when using them to find the compressibility factor, Z.
 
Maylis said:
He may be speaking about the Lee-Kesler correlations, which are found in tables in the same textbook mentioned. Those tables require the use of double interpolation, so be methodical when using them to find the compressibility factor, Z.

I see. Yupp, my friend said he has understood the concept. :) Thanks!
 

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