Exercise 20.66 - Enhanced - with Feedback and Hints MISSED THIS? Read Section 20.5 (Page); Watch KCV 20.5, IWE 20.6. Use tabulated half-cell potentials to calculate AGxn for each of the following reactions at 25 PC. 2Fe³+ (aq) + 3Sn(s) → 2Fe(s) + 3Sn²+ (aq) Express the energy change in kilojoules to two significant figures. ► View Available Hint(s) AGixn= Submit Part B AGTxn= [5] ΑΣΦ 3 Submit ? O2(g) + 2H₂O(1) + 2Cu(s)→ 4OH(aq) + 2Cu²+ (aq) Express the energy change in kilojoules to one significant figure. ► View Available Hint(s) [5] ΑΣΦ kJ ? kJ Review | Constants I Pe

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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**Exercise 20.66 - Enhanced with Feedback and Hints**

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**MISSED THIS?** Read Section 20.5 (Page); Watch KCV 20.5, IWE 20.6.

Use tabulated half-cell potentials to calculate \(\Delta G^\circ_{\text{rxn}}\) for each of the following reactions at 25 °C.

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**Part A**

Reaction: \(2\text{Fe}^{3+}(\text{aq}) + 3\text{Sn}(\text{s}) \rightarrow 2\text{Fe}(\text{s}) + 3\text{Sn}^{2+}(\text{aq})\)

Express the energy change in kilojoules to two significant figures.

- [ ] View Available Hint(s)
  
Input box: \(\Delta G^\circ_{\text{rxn}} =\) [   ] kJ  

*Submit Button*

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**Part B**

Reaction: \( \text{O}_2(\text{g}) + 2\text{H}_2\text{O}(\text{l}) + 2\text{Cu}(\text{s}) \rightarrow 4\text{OH}^-(\text{aq}) + 2\text{Cu}^{2+}(\text{aq})\) 

Express the energy change in kilojoules to one significant figure.

- [ ] View Available Hint(s)

Input box: \(\Delta G^\circ_{\text{rxn}} =\) [   ] kJ

*Submit Button*

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**Part C**

Reaction: \(\text{Br}_2(\text{l}) + 2\text{I}^-(\text{aq}) \rightarrow 2\text{Br}^-(\text{aq}) + \text{I}_2(\text{s})\) 

(Note: This part wasn't fully visible in the image, but is listed as Part C.)

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This exercise asks students to calculate the Gibbs free energy change (\(\Delta G^\circ_{\text{rxn}}\)) for specific redox reactions using standard half-cell potentials and to present their answers in kilojoules with the correct number of significant figures.
Transcribed Image Text:**Exercise 20.66 - Enhanced with Feedback and Hints** --- **MISSED THIS?** Read Section 20.5 (Page); Watch KCV 20.5, IWE 20.6. Use tabulated half-cell potentials to calculate \(\Delta G^\circ_{\text{rxn}}\) for each of the following reactions at 25 °C. --- **Part A** Reaction: \(2\text{Fe}^{3+}(\text{aq}) + 3\text{Sn}(\text{s}) \rightarrow 2\text{Fe}(\text{s}) + 3\text{Sn}^{2+}(\text{aq})\) Express the energy change in kilojoules to two significant figures. - [ ] View Available Hint(s) Input box: \(\Delta G^\circ_{\text{rxn}} =\) [ ] kJ *Submit Button* --- **Part B** Reaction: \( \text{O}_2(\text{g}) + 2\text{H}_2\text{O}(\text{l}) + 2\text{Cu}(\text{s}) \rightarrow 4\text{OH}^-(\text{aq}) + 2\text{Cu}^{2+}(\text{aq})\) Express the energy change in kilojoules to one significant figure. - [ ] View Available Hint(s) Input box: \(\Delta G^\circ_{\text{rxn}} =\) [ ] kJ *Submit Button* --- **Part C** Reaction: \(\text{Br}_2(\text{l}) + 2\text{I}^-(\text{aq}) \rightarrow 2\text{Br}^-(\text{aq}) + \text{I}_2(\text{s})\) (Note: This part wasn't fully visible in the image, but is listed as Part C.) --- This exercise asks students to calculate the Gibbs free energy change (\(\Delta G^\circ_{\text{rxn}}\)) for specific redox reactions using standard half-cell potentials and to present their answers in kilojoules with the correct number of significant figures.
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