Part A Calculate the standard enthalpy of formation of FeS2 (s) at 595 °C from the following data at 298.15 K. Assume that the heat capacities are independent of temperature. Fe(s) FeS2(s) Fe2O3 (s) S(rhombic) SO2(g) Substance AH: (kJ - mol 1) -824.2 -296.81 CP m/R 3.02 7.48 2.72 You are also given that for the reaction 2FES2(s) + 402(g) → Fe2O3 (s) + 4SO2(g), AH; = -1655 kJ - mol 1 Express your answer to four significant figures and include the appropriate units. kJ AH; =- 178.2 mol Submit Previous Answers Reguest Answer X Incorrect; Try Again; 3 attempts remaining
Part A Calculate the standard enthalpy of formation of FeS2 (s) at 595 °C from the following data at 298.15 K. Assume that the heat capacities are independent of temperature. Fe(s) FeS2(s) Fe2O3 (s) S(rhombic) SO2(g) Substance AH: (kJ - mol 1) -824.2 -296.81 CP m/R 3.02 7.48 2.72 You are also given that for the reaction 2FES2(s) + 402(g) → Fe2O3 (s) + 4SO2(g), AH; = -1655 kJ - mol 1 Express your answer to four significant figures and include the appropriate units. kJ AH; =- 178.2 mol Submit Previous Answers Reguest Answer X Incorrect; Try Again; 3 attempts remaining
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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
4.22
![**Thermo - Problem 4.22**
**Part A**
Calculate the standard enthalpy of formation of \( \text{FeS}_2 \, (\text{s}) \) at 595°C from the following data at 298.15 K. Assume that the heat capacities are independent of temperature.
| Substance | \( \text{Fe(s)} \) | \( \text{FeS}_2 \, (\text{s}) \) | \( \text{Fe}_2\text{O}_3 \, (\text{s}) \) | S (rhombic) | \( \text{SO}_2 \, (\text{g}) \) |
|---------------|-------------------|----------------|------------------|----------------|---------------|
| \( \Delta H_f^\circ \, (\text{kJ · mol}^{-1}) \) | | | \(-824.2\) | | \(-296.81\) |
| \( \frac{C_{p,m}}{R} \) | 3.02 | 7.48 | | 2.72 | |
You are also given that for the reaction:
\[ 2\text{FeS}_2 (\text{s}) + \frac{11}{2} \text{O}_2 (\text{g}) \rightarrow \text{Fe}_2\text{O}_3 (\text{s}) + 4\text{SO}_2 (\text{g}), \]
\[ \Delta H_r^\circ = -1655 \, \text{kJ · mol}^{-1}. \]
**Express your answer to four significant figures and include the appropriate units.**
\[
\Delta H_f^\circ = \boxed{-178.2} \, \text{kJ/mol}
\]
**Submit** | **Previous Answers** | **Request Answer**
*Note: The calculated answer above is marked incorrect. There are 3 attempts remaining.*](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8dbff956-e43c-48ff-b648-b98fd3ab1747%2F940b7ce0-5971-4ce0-b0f4-1c313146cb8a%2Fuwqjnq8_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Thermo - Problem 4.22**
**Part A**
Calculate the standard enthalpy of formation of \( \text{FeS}_2 \, (\text{s}) \) at 595°C from the following data at 298.15 K. Assume that the heat capacities are independent of temperature.
| Substance | \( \text{Fe(s)} \) | \( \text{FeS}_2 \, (\text{s}) \) | \( \text{Fe}_2\text{O}_3 \, (\text{s}) \) | S (rhombic) | \( \text{SO}_2 \, (\text{g}) \) |
|---------------|-------------------|----------------|------------------|----------------|---------------|
| \( \Delta H_f^\circ \, (\text{kJ · mol}^{-1}) \) | | | \(-824.2\) | | \(-296.81\) |
| \( \frac{C_{p,m}}{R} \) | 3.02 | 7.48 | | 2.72 | |
You are also given that for the reaction:
\[ 2\text{FeS}_2 (\text{s}) + \frac{11}{2} \text{O}_2 (\text{g}) \rightarrow \text{Fe}_2\text{O}_3 (\text{s}) + 4\text{SO}_2 (\text{g}), \]
\[ \Delta H_r^\circ = -1655 \, \text{kJ · mol}^{-1}. \]
**Express your answer to four significant figures and include the appropriate units.**
\[
\Delta H_f^\circ = \boxed{-178.2} \, \text{kJ/mol}
\]
**Submit** | **Previous Answers** | **Request Answer**
*Note: The calculated answer above is marked incorrect. There are 3 attempts remaining.*
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