Which Reaction Has the Highest Kp Value?

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Discussion Overview

The discussion revolves around determining which reaction among several thermal decompositions of carbonates has the highest equilibrium constant (Kp) value. The reactions involve the decomposition of magnesium, calcium, strontium, and barium carbonates into their respective oxides and carbon dioxide gas. The scope includes conceptual understanding of Kp in relation to thermal decomposition.

Discussion Character

  • Homework-related, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions how to determine which reaction has the maximum Kp, noting that Kp is equal to the partial pressure of CO2 for all reactions presented.
  • Another participant suggests that the question may relate to the ease of thermal decomposition of the carbonates.
  • A later reply proposes that the answer might be magnesium carbonate (a)), indicating a possible preference based on decomposition ease.
  • One participant expresses reluctance to provide a direct answer, emphasizing the nature of the question as a test item rather than a homework query.
  • Another participant clarifies that the question is indeed from a test taken recently and expresses confidence in their answer.

Areas of Agreement / Disagreement

The discussion reflects uncertainty about how to assess Kp values in the context of thermal decomposition, with no consensus on which reaction has the highest Kp. Multiple viewpoints on the interpretation of the question and the factors influencing Kp are present.

Contextual Notes

Participants have not fully explored the underlying factors that might influence Kp values, such as temperature, enthalpy changes, or the stability of the products formed. The discussion lacks detailed mathematical analysis or specific data to support claims.

Who May Find This Useful

Students studying chemical equilibrium, particularly in the context of thermal decomposition reactions, as well as those preparing for chemistry tests involving Kp values.

Saitama
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Homework Statement


Which has the max. value of KP-
a)MgCO3(s) --> MgO(s)+CO2(g)
b)CaCO3(s) --> CaO(s)+CO2(g)
c)SrCO3(s) --> SrO(s)+CO2(g)
d)BaCO3(s) --> BaO(s)+CO2(g)

Homework Equations





The Attempt at a Solution



I don't understand how we could determine which has the max. Kp because in all the equations Kp=PCO2. What other factors should i look into?

Thanks!
 
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Perhaps it asks about the ease of the thermal decomposition?
 
Borek said:
Perhaps it asks about the ease of the thermal decomposition?

Then i guess the answer is a). Right? :smile:
 
If I will answer yes or no I will do your homework.
 
Borek said:
If I will answer yes or no I will do your homework.

It isn't a homework question anyway, it is a question from a test i gave a few days ago.
But i am sure about the answer.
 

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