AP Chemistry
5.2 Introduction to Rate Law
The initial rates of the reaction represented below were measured at \(298\text{ K}\) for several different initial concentrations of \(\text{NO}(g)\) and \(\text{Br}_2(g)\).
\[ 2\text{NO}(g) + \text{Br}_2(g) \rightarrow 2\text{NOBr}(g) \]
Based on the experimental data, what is the value of the rate constant, \(k\), for the reaction at \(298\text{ K}\)?
\[ 2\text{NO}(g) + \text{Br}_2(g) \rightarrow 2\text{NOBr}(g) \]
| Trial | Initial \([\text{NO}]\) (\(\text{M}\)) | Initial \([\text{Br}_2]\) (\(\text{M}\)) | Initial rate of formation of \(\text{NOBr}\) (\(\text{M}\cdot\text{s}^{-1}\)) |
|---|---|---|---|
| \(1\) | \(0.10\) | \(0.20\) | \(2.4 \times 10^{-3}\) |
| \(2\) | \(0.20\) | \(0.20\) | \(9.6 \times 10^{-3}\) |
| \(3\) | \(0.10\) | \(0.40\) | \(4.8 \times 10^{-3}\) |
Based on the experimental data, what is the value of the rate constant, \(k\), for the reaction at \(298\text{ K}\)?
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