The following data are for the decomposition of hydrogen peroxide in dilute sodium hydroxide at 20 °C. H2O2(aq) –→ H2O(1) + ½ O2(g) - [H,02 ], M 1.27x10-2 6.35×103 7.95 3.18×10-3 15.9 1.59x103 23.9 time, min Hint: It is not necessary to graph these data. (1) The half life observed for this reaction is min . (2) Based on these data, the rate constant for this order reaction is min ! <>

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**Data for the Decomposition of Hydrogen Peroxide**

**Reaction:**
\[ \text{H}_2\text{O}_2(aq) \rightarrow \text{H}_2\text{O}(l) + \frac{1}{2} \text{O}_2(g) \]

**Conditions:**
- The data is for the decomposition of hydrogen peroxide in dilute sodium hydroxide at 20 °C.

**Table: Concentration of Hydrogen Peroxide Over Time**

| [H₂O₂], M | Time, min  |
|-----------|------------|
| 1.27×10⁻² | 0          |
| 6.35×10⁻³ | 7.95       |
| 3.18×10⁻³ | 15.9       |
| 1.59×10⁻³ | 23.9       |

**Notes:**
- It is not necessary to graph these data for analysis.

**Calculations:**

1. **Half-Life:**
   - The half-life observed for this reaction is ______ min.

2. **Reaction Order and Rate Constant:**
   - Based on these data, the rate constant for this ______ order reaction is ______ min⁻¹.

**Instructions:**
- Use the provided data to determine the half-life and the rate constant for the reaction.
- Submit your answers or retry if needed.
Transcribed Image Text:**Data for the Decomposition of Hydrogen Peroxide** **Reaction:** \[ \text{H}_2\text{O}_2(aq) \rightarrow \text{H}_2\text{O}(l) + \frac{1}{2} \text{O}_2(g) \] **Conditions:** - The data is for the decomposition of hydrogen peroxide in dilute sodium hydroxide at 20 °C. **Table: Concentration of Hydrogen Peroxide Over Time** | [H₂O₂], M | Time, min | |-----------|------------| | 1.27×10⁻² | 0 | | 6.35×10⁻³ | 7.95 | | 3.18×10⁻³ | 15.9 | | 1.59×10⁻³ | 23.9 | **Notes:** - It is not necessary to graph these data for analysis. **Calculations:** 1. **Half-Life:** - The half-life observed for this reaction is ______ min. 2. **Reaction Order and Rate Constant:** - Based on these data, the rate constant for this ______ order reaction is ______ min⁻¹. **Instructions:** - Use the provided data to determine the half-life and the rate constant for the reaction. - Submit your answers or retry if needed.
---

In a study of the decomposition of ammonia on a tungsten surface at 1100°C, the following data were obtained:

\[
\text{NH}_3 \rightarrow \frac{1}{2} \text{N}_2 + \frac{3}{2} \text{H}_2
\]

| [NH₃], M     | Seconds |
|--------------|---------|
| 1.35×10⁻²    | 0       |
| 6.75×10⁻³    | 442     |
| 3.38×10⁻³    | 663     |
| 1.69×10⁻³    | 774     |

**Hint:** It is not necessary to graph these data.

1. The observed half-life for this reaction when the starting concentration is 1.35×10⁻² M is \_\_\_\_ s and when the starting concentration is 6.75×10⁻³ M is \_\_\_\_ s.

2. The average rate of disappearance of NH₃ from t = 0 s to t = 442 s is \_\_\_\_ M s⁻¹.

3. The average rate of disappearance of NH₃ from t = 442 s to t = 663 s is \_\_\_\_ M s⁻¹.

4. Based on these data, the rate constant for this [ ] order reaction is \_\_\_\_ M s⁻¹.

**Buttons:**
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Transcribed Image Text:--- In a study of the decomposition of ammonia on a tungsten surface at 1100°C, the following data were obtained: \[ \text{NH}_3 \rightarrow \frac{1}{2} \text{N}_2 + \frac{3}{2} \text{H}_2 \] | [NH₃], M | Seconds | |--------------|---------| | 1.35×10⁻² | 0 | | 6.75×10⁻³ | 442 | | 3.38×10⁻³ | 663 | | 1.69×10⁻³ | 774 | **Hint:** It is not necessary to graph these data. 1. The observed half-life for this reaction when the starting concentration is 1.35×10⁻² M is \_\_\_\_ s and when the starting concentration is 6.75×10⁻³ M is \_\_\_\_ s. 2. The average rate of disappearance of NH₃ from t = 0 s to t = 442 s is \_\_\_\_ M s⁻¹. 3. The average rate of disappearance of NH₃ from t = 442 s to t = 663 s is \_\_\_\_ M s⁻¹. 4. Based on these data, the rate constant for this [ ] order reaction is \_\_\_\_ M s⁻¹. **Buttons:** - Submit Answer - Retry Entire Group *Navigation:* - Previous - Next ---
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