An exercise about chemical equilibrium

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SUMMARY

The forum discussion centers on a problem set regarding chemical equilibrium, specifically the equilibrium constant expression for the reaction involving nitrogen monoxide (NO), bromine (Br2), and nitrosyl bromide (NOBr). The user identifies a mistake in their calculation, noting the need to exponentiate the concentrations in the equilibrium expression: k = [NO]2[Br2]/[NOBr]2. Additionally, there is confusion regarding the physical state of NO, which is incorrectly listed as a solid under conditions that are not feasible, given its boiling point.

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samy4408
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Homework Statement
my answer is an image in the post
Relevant Equations
no particular equations
Hello i am trying to solve a problem set about chemical equilibrium , the issue is that my results don't correspond to the correction . can someone tell me what is wrong with my answer , thanks
here is the problem and his correction :
1649722814871.png


here is my answer :
1649722980746.png
 
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It seems that you forgot to exponentiate the concentration of mols, that is:

$$ k = \frac{[NO]^2[Br_2]}{[NOBr]^2} $$
 
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that^^^

Strange that the question lists NO as a solid. That would mean temperature below -164°C, at the same time NOBr boils at 15°C, so it would be solid as well. Doesn't make much sense.
 

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