Problem: At a particular temperature, K = 4.0 x 10 -7 for the reactionN2O4(g) ⇌ 2NO2(g)In an experiment, 1.0 mole of N2O4 is placed in a 10.0-L vessel. Calculate the concentrations of N2O4 and NO2 when this reaction reaches equilibrium.

FREE Expert Solution

We are asked to calculate the concentrations of N2O4 and NO2 when this reaction reaches equilibrium.


Step 1. Calculate molarity N2O4

M N2O4 = molLM N2O4 =1 mol N2O410 L

M  N2O4 = 0.1 M


Step 2. Set up ICE chart



Step 3. Calculate molarity in equilibrium


K = [NO2]2[N2O4]4.0 × 10-7 = [2x]2[0.1-x]

x is negligible in the denominator since K is very small. 


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Problem Details

At a particular temperature, K = 4.0 x 10 -7 for the reaction

N2O4(g) ⇌ 2NO2(g)

In an experiment, 1.0 mole of N2O4 is placed in a 10.0-L vessel. Calculate the concentrations of N2O4 and NO2 when this reaction reaches equilibrium.