(Solved): 1. Consider the following reaction: N2O4(g)2NO2(g) Assume that an experiment is car ...

1. Consider the following reaction: ${\mathrm{N}}_2{\mathrm{O}}_4(\mathrm{g})?2{\mathrm{NO}}_2(\mathrm{g})$ Assume that an experiment is carried out in which the starting concentration of ${\mathrm{N}}_2{\mathrm{O}}_4(\mathrm{g})$ is $0.200\mathrm{mol}/\mathrm{L}$. No products are present at the beginning of the reaction. When equilibrium is established, the concentration of ${\mathrm{NO}}_2(\mathrm{g})$ is $2.57\times 10^2\mathrm{mol}/\mathrm{L}$. Calculate the equilibrium constant for the above reaction. 2. The compound $\mathrm{NOCl}$ decomposes to nitric oxide and chlorine according to the following equation: $2\mathrm{NOCl}(\mathrm{g})?2\mathrm{NO}(\mathrm{g})+{\mathrm{Cl}}_2(\mathrm{g})$ Suppose that $0.690\mathrm{mol}\mathrm{NOCl}$ is placed in a 3.00 -L flask at a given temperature. When equilibrium has been established, it is found that the concentration of ${\mathrm{Cl}}_2$ is $0.0284\mathrm{M}$. Calculate the equilibrium constant for this reaction.