**Table of Standard Entropies (ΔS°) for Various Compounds**| Compound | ΔS° (J/K) ||----------|-----------|| CH₄(g) | 219.4 || C₂H₆(g) | 229.5 || H₂(g) | 130.58 || NO₂(g) | 240.45 || N₂O(g) | 304.3 || Fe₂O₃(s) | 89.96 || O₂(g) | 205.0 || Fe(s) | 27.15 |This table presents the standard entropies of various compounds in their standard states. The entropy values are provided in units of joules per Kelvin (J/K). Each compound is listed with its chemical formula and physical state (gaseous or solid) indicated in parentheses. **Transcription for Educational Website****Task: Calculating Standard Entropy Change (ΔS°) for Chemical Reactions**4. Using the tabulated values, calculate ΔS° for the following reactions (Table on the next page):a. $ \text{C}_2\text{H}_4(g) + \text{H}_2(g) \rightarrow \text{C}_2\text{H}_6(g) $b. $ \text{N}_2\text{O}_4(g) \rightarrow 2 \text{NO}_2(g) $c. $ 2 \text{Fe}_2\text{O}_3(s) \rightarrow 4 \text{Fe}(s) + 3 \text{O}_2(g) $

Answer:Here: ai and bi are the stoichiometric coefficients

Answered: 4. Using the tabulated values,…

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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**Table of Standard Entropies (ΔS°) for Various Compounds**

| Compound | ΔS° (J/K) |
|----------|-----------|
| CH₄(g) | 219.4 |
| C₂H₆(g) | 229.5 |
| H₂(g) | 130.58 |
| NO₂(g) | 240.45 |
| N₂O(g) | 304.3 |
| Fe₂O₃(s) | 89.96 |
| O₂(g) | 205.0 |
| Fe(s) | 27.15 |

This table presents the standard entropies of various compounds in their standard states. The entropy values are provided in units of joules per Kelvin (J/K). Each compound is listed with its chemical formula and physical state (gaseous or solid) indicated in parentheses.

**Transcription for Educational Website**

**Task: Calculating Standard Entropy Change (ΔS°) for Chemical Reactions**

4. Using the tabulated values, calculate ΔS° for the following reactions (Table on the next page):

a. $ \text{C}_2\text{H}_4(g) + \text{H}_2(g) \rightarrow \text{C}_2\text{H}_6(g) $

b. $ \text{N}_2\text{O}_4(g) \rightarrow 2 \text{NO}_2(g) $

c. $ 2 \text{Fe}_2\text{O}_3(s) \rightarrow 4 \text{Fe}(s) + 3 \text{O}_2(g) $

Expert Solution

Step 1: Formula to calculate entropy change!

Answer:

$increment straight S subscript rxn superscript 0 equals sum from straight i equals 1 to straight n of straight a subscript straight i straight S subscript product minus sum from straight i equals 1 to straight n of straight b subscript straight i straight S subscript reactant$

Here: a_i and b_i are the stoichiometric coefficients

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