Will CO Convert to CO2 Quickly in High Temperatures?

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Discussion Overview

The discussion revolves around the reactions of carbon monoxide (CO) and nitrogen oxides (NO) in high-temperature environments, particularly in the context of internal combustion engines. Participants explore the likelihood of these reactions occurring in both forward and reverse directions, considering thermodynamic principles and reaction kinetics.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Mathematical reasoning

Main Points Raised

  • One participant questions which reaction is more likely to occur at high temperatures, specifically regarding the conversion of CO to CO2 and the behavior of NO.
  • Another participant asserts that internal combustion engines rely on exothermic combustion processes, suggesting that the reactions are more likely to proceed as initially written.
  • A suggestion is made to calculate the Gibbs free energy change for each reaction to determine spontaneity, referencing thermodynamic data.
  • A participant claims to have found both reactions to be spontaneous but notes that the reverse reactions are endothermic.
  • It is mentioned that while the reactions may be thermodynamically spontaneous, the short time frame in which they occur may prevent complete conversion.

Areas of Agreement / Disagreement

Participants express differing views on the likelihood of the reactions occurring in specific directions and the implications of thermodynamic spontaneity versus reaction kinetics. No consensus is reached regarding the complete conversion of CO to CO2 in high temperatures.

Contextual Notes

Participants reference thermodynamic data and the kinetics of reactions, indicating that assumptions about reaction times and conditions may affect the discussion. Specific definitions and parameters for spontaneity and reaction rates are not fully clarified.

afcwestwarrior
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im wondering what reaction would likely occur
2NO (g) → N2(g) + O2(g) or the reverse

2CO (g) + O2(g) → 2CO2 (g) or the reverse

well the first one would occur if it were the reverse because of the high temperatures in the engine, but I am wondering about carbon monoxide, what do you guys think
 
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wait a minute, All internal combustion engines depend on the exothermic chemical process of combustion
so therefore these are more likely to occur the way i wrote them
 
Calculate the change in the gibbs free energy for each reaction and the reverse from the thermodynamic data in the back of any general chemistry text. That will tell you which is going to more spontaneously occur.
 
i did, and the ones i wrote are both spontaneous, but the reverse are endothermic
 
Thermaldynamically, those reaction are spontaneous, but the time is so short that they can not convert completely. Reactions take time.
 

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