SO2 Conversion Equilibrium Curve

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Discussion Overview

The discussion centers around how to draw an equilibrium curve for the oxidation of SO2 to SO3, specifically focusing on the relationship between the equilibrium constant (Kp) and temperature. Participants explore the necessary equations and data required for plotting the conversion ratio against temperature.

Discussion Character

  • Technical explanation
  • Homework-related
  • Debate/contested

Main Points Raised

  • One participant seeks guidance on how to use the provided equations to draw an equilibrium curve for SO2 oxidation.
  • Another participant suggests that plotting Kp against temperature using the second equation is a possible approach, but notes the ambiguity in the original request.
  • A later reply clarifies that the conversion ratio depends not only on Kp and temperature but also on total pressure, indicating that additional data is necessary for accurate plotting.
  • It is mentioned that calculating the conversion ratio from Kc may require assumptions about initial amounts or volume.

Areas of Agreement / Disagreement

Participants do not reach a consensus on how to proceed with the graphing task, as there are differing views on the necessary data and assumptions required for the conversion ratio.

Contextual Notes

Limitations include the need for additional data regarding total pressure and initial conditions, which are not provided in the discussion.

dragon01
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TL;DR
Conversion Equilibrium Curve
Hi...
i want to draw Equilibrium curve for SO2 oxidation to SO3, i found following relations but don't know to use them... kindly tell me how to draw Equilibrium curve using these equations or any source on web from where i can get directly SO2 oxidation data Vs Temp?

Equations are following;

1. Kp = (PSO3) /(PSO2) (PO2)1/2
2. log Kp = (4956 /T) - 4.678
thank you!
 
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dragon01 said:
i want to draw Equilibrium curve for SO2 oxidation to SO3

It is not clear what you are looking for, please elaborate.

Kp is the equilibrium constant for the process so technically just using the second equation to make a plot of Kp vs T is a possible answer. That is, assuming by "curve" you mean the dependence on the temperature, because even that is not clear from your post.
 
Borek said:
It is not clear what you are looking for, please elaborate.

Kp is the equilibrium constant for the process so technically just using the second equation to make a plot of Kp vs T is a possible answer. That is, assuming by "curve" you mean the dependence on the temperature, because even that is not clear from your post.

Well, I should find the equilibrium curve of conversion of SO2 in SO3. I should have on the Y axes the conversion ratio, on the X axes the Temperature measured in Kelvin. I have the definition of Kp as showed, but I really don’t know how to elaborate a graph on excel with this characteristics
 
There is not enough data - conversion ratio is not only a function of Kp and T, but also of total pressure.

For a given pressure you should be able to calculate the conversion ratio from Kc (probably with some additional assumptions about initial amounts/volume), then making a plot is easy.
 

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