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posted by ss83 on 7/7/2008 9:36:55 PM | status: Live

Equilibrium constants-will give lifesaver if correct!

Course	Textbook	Chapter	Problem
General Chemistry	N/A	14	N/A

Question Details:

The equilibrium constant

of a reaction is determined by the concentrations of the reactants and products at equilibrium. The values of the concentrations at equilibrium of reactants and products can change with temperature. Therefore, an equilibrium constant for a reaction is valid only for the temperature at which it was determined.

Phosgene (carbonyl chloride) is an extremely toxic gas that is used in manufacturing certain dyes and plastics. Phosgene can be produced by reacting carbon monoxide and chlorine gas at high temperatures:

$\rm CO({\it g})+ Cl_2({\it g}) \rightleftharpoons COCl_{2}({\it g})$

Carbon monoxide and chlorine gas are allowed to react in a sealed vessel at 466 $^{\circ}\rm C$ . At equilibrium, the final concentrations of each of the species is measured and the following results are obtained:

Gas	Partial pressure
$\rm CO$	0.760
$\rm Cl_2$	1.15
$\rm COCl_2$	0.170

What is the equilibrium constant K_p

of this reaction?

Enter your answer numerically

=?

Often, it is difficult to measure the equilibrium concentrations of all the reactants and products of a reaction. However, if the starting concentrations are known, and just one equilibrium concentration can be measured,

can still be determined.

Tags: Chemistry, General Chemistry

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