How Does Temperature Affect NO2 Formation in Combustion?

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SUMMARY

The discussion focuses on the thermodynamic principles governing the formation of nitrogen dioxide (NO2) during combustion, particularly at elevated temperatures. It emphasizes the calculation of equilibrium partial pressure of NO2 at 1 atm and 1600 K, utilizing values for delta G and delta H. Participants highlight the need to calculate the equilibrium constant (K) for the reaction, starting with NO2, and derive the partial pressures of nitrogen (N) and oxygen (O2) based on stoichiometric relationships.

PREREQUISITES
  • Understanding of thermodynamic principles, specifically delta G and delta H.
  • Knowledge of chemical equilibrium and reaction stoichiometry.
  • Familiarity with the ideal gas law and partial pressure calculations.
  • Basic concepts of combustion chemistry and trace gas formation.
NEXT STEPS
  • Calculate the equilibrium constant (K) for the combustion reaction of NO2.
  • Explore the impact of temperature on the equilibrium position of gas-phase reactions.
  • Investigate the role of trace gases in combustion and their environmental effects.
  • Learn about advanced thermodynamic calculations using software tools like MATLAB or Python.
USEFUL FOR

Chemistry students, combustion researchers, environmental scientists, and anyone studying thermodynamics in gas-phase reactions.

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Homework Statement



We discussed the fact that the formation of some trace gases is thermodynamically unfavorable at low temperature, but more favorable at elevated temperatures. Using the values for delta G and delta H in the notes, calculate the equilibrium partial pressure of NO2 during combustion at at 1 atm and T = 1600 K.


The Attempt at a Solution


Just getting stuck on what the partial pressure of [N] and [O2] are.
 
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Calculate K for the reaction, assume you start with just NO2, then pressures of other gasses can be calculated from the reaction stoichiometry.

The wording seems to be unclear.

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