The accompanying graph shows the concentration of a reactant as a function of time for two different reactions. One of the reactions is first order and the other is second order. A) Which of the two reactions is first order? B) Which of the two reactions is second order? C)
The accompanying graph shows the concentration of a reactant as a function of time for two different reactions. One of the reactions is first order and the other is second order. A) Which of the two reactions is first order? B) Which of the two reactions is second order? C)
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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The accompanying graph shows the concentration of a reactant as a function of time for two different reactions. One of the reactions is first order and the other is second order.
A) Which of the two reactions is first order?
B) Which of the two reactions is second order?
C)
Transcribed Image Text:**Exercise 14.121**
The accompanying graph shows the concentration of a reactant as a function of time for two different reactions. One of the reactions is first order and the other is second order.
**Graph Explanation:**
- **Axes:**
- The x-axis represents time (s), ranging from 0 to 120 seconds.
- The y-axis represents concentration (M), ranging from 0.0 to 1.0 M.
- **Curves:**
- The graph contains two curves.
- The first curve (labeled A) starts at a higher concentration around 1.0 M and demonstrates an exponential decrease as time progresses.
- The second curve (labeled B) starts at the same initial concentration but decays more sharply, indicating a faster decrease in concentration compared to curve A.
- **Analysis:**
- Both curves demonstrate rate of reaction dependent on reactant concentration.
- Curve A likely represents a first-order reaction where the rate depends linearly on the reactant concentration.
- Curve B likely represents a second-order reaction where the rate is proportional to the square of the reactant concentration.
This graph helps illustrate the differing behaviors of first-order and second-order reactions in terms of concentration over time.
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