Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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![**Educational Exercise: Calculating Enthalpy Change (\( \Delta H^{\circ} \))**
**Instructions:**
While solving this problem, you may want to reference Section 5.7, Pages 187 - 190.
Use values from Appendix C to calculate the standard enthalpy change (\( \Delta H^{\circ} \)) for the following reactions.
---
**Part C:**
**Reaction:**
\[ 2\text{CuO(s)} + \text{NO(g)} \rightarrow \text{Cu}_2\text{O(s)} + \text{NO}_2\text{(g)} \]
**Task:**
Express your answer using three significant figures.
**Input Box:**
\( \Delta H^{\circ}_{\text{rxn}} = \) \_\_\_\_ kJ
- Click "Submit" to enter your answer.
- If you need help, click "Request Answer."
---
**Part D:**
**Reaction:**
\[ 4\text{NH}_3\text{(g)} + \text{O}_2\text{(g)} \rightarrow 2\text{N}_2\text{H}_4\text{(g)} + 2\text{H}_2\text{O(l)} \]
**Task:**
Express your answer using five significant figures.
**Input Box:**
\( \Delta H^{\circ}_{\text{rxn}} = \) \_\_\_\_ kJ
- Click "Submit" to enter your answer.
- If you need help, click "Request Answer."
**Note:** Use the provided tools and symbols to accurately write your calculations.](https://content.bartleby.com/qna-images/question/4a2bd348-d826-4056-b9ee-5fd404bc60f1/d286a4c4-38fb-447a-a907-22109ac9be29/34zssng_processed.png)
Transcribed Image Text:**Educational Exercise: Calculating Enthalpy Change (\( \Delta H^{\circ} \))**
**Instructions:**
While solving this problem, you may want to reference Section 5.7, Pages 187 - 190.
Use values from Appendix C to calculate the standard enthalpy change (\( \Delta H^{\circ} \)) for the following reactions.
---
**Part C:**
**Reaction:**
\[ 2\text{CuO(s)} + \text{NO(g)} \rightarrow \text{Cu}_2\text{O(s)} + \text{NO}_2\text{(g)} \]
**Task:**
Express your answer using three significant figures.
**Input Box:**
\( \Delta H^{\circ}_{\text{rxn}} = \) \_\_\_\_ kJ
- Click "Submit" to enter your answer.
- If you need help, click "Request Answer."
---
**Part D:**
**Reaction:**
\[ 4\text{NH}_3\text{(g)} + \text{O}_2\text{(g)} \rightarrow 2\text{N}_2\text{H}_4\text{(g)} + 2\text{H}_2\text{O(l)} \]
**Task:**
Express your answer using five significant figures.
**Input Box:**
\( \Delta H^{\circ}_{\text{rxn}} = \) \_\_\_\_ kJ
- Click "Submit" to enter your answer.
- If you need help, click "Request Answer."
**Note:** Use the provided tools and symbols to accurately write your calculations.
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