Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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---
### Balancing Chemical Equations and Calculating Enthalpy Change
**Question a:**
Write a balanced chemical equation for the formation of 1 mol of \( \text{Cr}_2\text{O}_3(s) \) from Cr and \( \text{O}_2 \) in their standard states.
> **Instructions:** Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank. If no reaction occurs, leave all boxes blank and click on Submit.
**Balanced Equation:**
\[
2\text{Cr (s)} + \frac{3}{2} \text{O}_2 \text{(g)} \rightarrow \text{Cr}_2\text{O}_3 \text{(s)}
\]
**Status:** Correct
The equation of the formation of \( \text{Cr}_2\text{O}_3(s) \) from the elements:
\[
2 \text{Cr (s)} + \frac{3}{2} \text{O}_2 \text{(g)} \rightarrow \text{Cr}_2\text{O}_3 \text{(s)}
\]
---
**Question b:**
What is the enthalpy change if 3.1 g of chromium is oxidized to \( \text{Cr}_2\text{O}_3(s) \)?
> \(\Delta_f H^\circ\) for \( \text{Cr}_2\text{O}_3 \text{(s)} = -1134.7 \, \text{kJ/mol} \)
**Enthalpy Change:**
\[
\text{Enthalpy change} = \_\_\_ \, \text{kJ}
\]
**Options:**
- **Submit**
- **Submit Answer**
- **Try Another Version**
- **10 item attempts remaining**
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---
This exercise involves balancing a chemical reaction and calculating the enthalpy change based on the given data. Ensure to input your calculations accurately to determine the enthalpy change.](https://content.bartleby.com/qna-images/question/f7ba9c54-af2b-48c5-8dd4-4f214c676725/ff79175e-f394-46ce-8024-ee4cad383109/fsug4wg_processed.jpeg)
Transcribed Image Text:Sure! Below is a transcription of the image content suitable for an educational website:
---
### Balancing Chemical Equations and Calculating Enthalpy Change
**Question a:**
Write a balanced chemical equation for the formation of 1 mol of \( \text{Cr}_2\text{O}_3(s) \) from Cr and \( \text{O}_2 \) in their standard states.
> **Instructions:** Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank. If no reaction occurs, leave all boxes blank and click on Submit.
**Balanced Equation:**
\[
2\text{Cr (s)} + \frac{3}{2} \text{O}_2 \text{(g)} \rightarrow \text{Cr}_2\text{O}_3 \text{(s)}
\]
**Status:** Correct
The equation of the formation of \( \text{Cr}_2\text{O}_3(s) \) from the elements:
\[
2 \text{Cr (s)} + \frac{3}{2} \text{O}_2 \text{(g)} \rightarrow \text{Cr}_2\text{O}_3 \text{(s)}
\]
---
**Question b:**
What is the enthalpy change if 3.1 g of chromium is oxidized to \( \text{Cr}_2\text{O}_3(s) \)?
> \(\Delta_f H^\circ\) for \( \text{Cr}_2\text{O}_3 \text{(s)} = -1134.7 \, \text{kJ/mol} \)
**Enthalpy Change:**
\[
\text{Enthalpy change} = \_\_\_ \, \text{kJ}
\]
**Options:**
- **Submit**
- **Submit Answer**
- **Try Another Version**
- **10 item attempts remaining**
*Controls:*
- Previous
- Next
- Email Instructor
- Save and Exit
---
This exercise involves balancing a chemical reaction and calculating the enthalpy change based on the given data. Ensure to input your calculations accurately to determine the enthalpy change.
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