The Reaction Quotient Video Lessons

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Problem: Consider the reaction and its equilibrium constant: N2O4(g) ⇌ 2NO2(g); Kc = 5.85 x 10–3 (at some temperature)A reaction mixture contains [NO2] = 0.0251 M and [N2O4] = 0.0331 M. Determine the direction in which the reaction will proceed.

FREE Expert Solution

For this problem, we have to determine the direction in which the reaction will proceed.

N2O4(g) ⇌ 2 NO2(g)


Recall that the equilibrium constant is the ratio of the products and reactants. We use Kp when dealing with pressure and Kc when dealing with concentration:


Kp=PproductsPreactants     Kc=[products][reactants]


Note that solid and liquid compounds are ignored in the equilibrium expression.


Since we’re given the concentration of each compound, we use Kc. The Kc expression for the reaction is:


Kc=[products][reactants]=[NO2]2[N2O4]



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Problem Details

Consider the reaction and its equilibrium constant: N2O4(g) ⇌ 2NO2(g); Kc = 5.85 x 10–3 (at some temperature)

A reaction mixture contains [NO2] = 0.0251 M and [N2O4] = 0.0331 M. Determine the direction in which the reaction will proceed.

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Based on our data, we think this problem is relevant for Professor Sabalewski's class at Bridgewater State University.