AP Chemistry
5.3 Concentration Changes Over Time
5.2 Introduction to Rate Law
A student investigates the kinetics of the gas-phase reaction \(2\text{ NO}_2(g) \rightarrow 2\text{ NO}(g) + \text{O}_2(g)\) at a constant temperature. Based on experimental data, the reaction is determined to be second order with respect to \(\text{NO}_2(g)\). The student collects the data shown in the table below.
Which of the following best predicts the initial rate of consumption of \(\text{NO}_2(g)\) in Trial 2 and provides the correct justification?
| Trial | Initial \([\text{NO}_2]\) (M) | Initial Rate of Consumption of \(\text{NO}_2\) (M/s) |
|---|---|---|
| 1 | 0.20 | \(1.2 \times 10^{-3}\) |
| 2 | 0.40 | ? |
Which of the following best predicts the initial rate of consumption of \(\text{NO}_2(g)\) in Trial 2 and provides the correct justification?
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