Posted in xn--kfs74mzzid01b.com edit by webmaster on January 7th, 2009
I am having trouble with the following question my workings come to an
answer of 5.10 but this is clearly incorrect I got to this via the
following..
[NOCl]2 0.454
------- = ----- = 5.10
[NO]2[Cl2] 0.089
Question:
For the following system at equilibrium:
2NO(g) + Cl2(g) - Eq - 2NOCl(g)
0.416 mol NO, 0.515 mol Cl2 and 0.311 mol NOCl are found in a 1.0L
container at 25oC.
Calculate the equilibrium constant, K, at 25oC.
Answer:
a) 2.82 b)3.49 c)0.921 d)1.09
Please show me the workings on how you got to your answer. Cheers.Hi!!
What is equilibrium constant (K)?
It is a constant at a given temperature such that when a reversible
chemical reaction aA + bB = cC + dD has reached equilibrium. It is
given by the following formula:
[C]^c * [D]^d
K = ----------------------
[A]^a * [B]^b
Where [X] is the molar concentration of the reactants and products
(moles of solute per litre of solvent).
For this problem you have:
- A system at equilibrium:
2NO(g) + Cl2(g) - Eq - 2NOCl(g) ;
with 0.416 mol NO, 0.515 mol Cl2 and 0.311 mol NOCl in a 1.0L container at 25 C.
The above means that:
[NO] = 0.416
[Cl2] = 0.515
[NOCl] = 0.311
Then:
K = (0.311^2) / (0.515 * 0.416^2) =
= (0.097) / (0.089) =
= 1.09
For further reading and examples see:
"Equilibrium Constant":
http://www.cartage.org.lb/en/themes/Sciences/Chemistry/Inorganicchemistry/Equilibrium/Equilibrium/Equilibrium.htm
"ChemTeam: Calc of Equilibrium Constant":
http://dbhs.wvusd.k12.ca.us/webdocs/Equilibrium/Calc-K-from-equilib-conc.html
"Calculating_Equilibrium_Constants":
http://www.chem.purdue.edu/gchelp/howtosolveit/Equilibrium/Calculating_Equilibrium_Constants.htm
Search strategy:
"equilibrium constant" chemical
"Molar concentration" equilibrium
I hope this helps you. Feel free to request for a clarification if you need it.
Regards,
livioflores-ga#If you have any other info about this subject , Please add it free.# |
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