AP Chemistry
5.3 Concentration Changes Over Time
5.1 Reaction Rates
The gas-phase decomposition of compound \(\text{A(g)}\) proceeds according to the balanced chemical equation below.
\[ 2\text{A(g)} \rightarrow \text{B(g)} \]
The reaction is first order with respect to \(\text{A(g)}\). A rigid container is initially filled with pure \(\text{A(g)}\) at a concentration of \(0.80\text{ M}\). The half-life of the reaction is \(40.\text{ s}\) at the temperature of the experiment. Which of the following correctly predicts the concentration of \(\text{B(g)}\) at \(t = 80.\text{ s}\) and describes the rate of appearance of \(\text{B(g)}\) as the reaction proceeds?
\[ 2\text{A(g)} \rightarrow \text{B(g)} \]
The reaction is first order with respect to \(\text{A(g)}\). A rigid container is initially filled with pure \(\text{A(g)}\) at a concentration of \(0.80\text{ M}\). The half-life of the reaction is \(40.\text{ s}\) at the temperature of the experiment. Which of the following correctly predicts the concentration of \(\text{B(g)}\) at \(t = 80.\text{ s}\) and describes the rate of appearance of \(\text{B(g)}\) as the reaction proceeds?
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