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MISSED THIS? Watch KCV: Cell Potential, Free Energy, and the Equilibrium Constant, IWE: Relating AG and Eᵒcell, Read Section 20.5. You can click on the Review link to access the section in your e Text. Use tabulated electrode potentials to calculate AGrxn for each reaction at 25 °C. Reduction half-reaction Pb²+ (aq) + 2e → Pb(s) Mg2+ (aq) + 2e → Mg(s) Br₂ (1) +2e7 → 2Br (aq) Cl₂ (1) +2e → 2C1- (aq) Cu²+ (aq) + 2e → Cu(s) MnO₂ (s) + 4H+ (aq) + 2e¯ → Mn²+ (aq) + 2H₂O(1) E° (V) -0.13 -2.37 1.09 1.36 0.34 1.21 Part A (aq) MnO2 (s) + 4H+ (aq) + Cu(s) →Mn²+ (aq) + 2H₂O(1) + Cu²+ Express your answer in kilojoules to two significant figures. AGixn= Submit Part B DA 1ΨΕΙ ΑΣΦ Request Answer ? Pb²+ (aq) + Mg(s) → Pb(s) + Mg²+ (aq) Express your answer in kilojoules to three significant figures. kJ

MISSED THIS? Watch KCV: Cell Potential, Free Energy, and the Equilibrium Constant, IWE: Relating AG and Eᵒcell, Read Section 20.5. You can click on the Review link to access the section in your e Text. Use tabulated electrode potentials to calculate AGrxn for each reaction at 25 °C. Reduction half-reaction Pb²+ (aq) + 2e → Pb(s) Mg2+ (aq) + 2e → Mg(s) Br₂ (1) +2e7 → 2Br (aq) Cl₂ (1) +2e → 2C1- (aq) Cu²+ (aq) + 2e → Cu(s) MnO₂ (s) + 4H+ (aq) + 2e¯ → Mn²+ (aq) + 2H₂O(1) E° (V) -0.13 -2.37 1.09 1.36 0.34 1.21 Part A (aq) MnO2 (s) + 4H+ (aq) + Cu(s) →Mn²+ (aq) + 2H₂O(1) + Cu²+ Express your answer in kilojoules to two significant figures. AGixn= Submit Part B DA 1ΨΕΙ ΑΣΦ Request Answer ? Pb²+ (aq) + Mg(s) → Pb(s) + Mg²+ (aq) Express your answer in kilojoules to three significant figures. kJ

Chemistry
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
Chapter18: Electrochemistry
Section: Chapter Questions
Problem 78E
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MISSED THIS? Watch KCV: Cell Potential, Free Energy, and the Equilibrium Constant, IWE: Relating AG and Eᵒcell; Read Section 20.5. You can click on the Review link to access the section in your e Text. Use tabulated electrode potentials to calculate AGxn for each reaction at 25 °C. Reduction half-reaction E° (V) -0.13 Pb²+ (aq) +2e¯¯ → Pb(s) Mg2+ (aq) + 2e → Mg(s) -2.37 Br₂ (1) +2e → 2Br (aq) 1.09 Cl₂ (1) + 2e → 2C1- (aq) 1.36 Cu²+ (aq) + 2e → Cu(s) 0.34 MnO₂ (s) + 4H+ (aq) + 2e¯ → Mn²+ (aq) + 2H₂O(l) 1.21 Part A MnO₂ (s) + 4H+ (aq) + Cu(s) → Mn²+ (aq) + 2H₂O(1) + Cu²+ (aq) Express your answer in kilojoules to two significant figures. 17| ΑΣΦΑ AGixn = Submit Part B Request Answer ? Pb²+ (aq) + Mg(s) → Pb(s) + Mg²+ (aq) Express your answer in kilojoules to three significant figures. kJ
Transcribed Image Text:MISSED THIS? Watch KCV: Cell Potential, Free Energy, and the Equilibrium Constant, IWE: Relating AG and Eᵒcell; Read Section 20.5. You can click on the Review link to access the section in your e Text. Use tabulated electrode potentials to calculate AGxn for each reaction at 25 °C. Reduction half-reaction E° (V) -0.13 Pb²+ (aq) +2e¯¯ → Pb(s) Mg2+ (aq) + 2e → Mg(s) -2.37 Br₂ (1) +2e → 2Br (aq) 1.09 Cl₂ (1) + 2e → 2C1- (aq) 1.36 Cu²+ (aq) + 2e → Cu(s) 0.34 MnO₂ (s) + 4H+ (aq) + 2e¯ → Mn²+ (aq) + 2H₂O(l) 1.21 Part A MnO₂ (s) + 4H+ (aq) + Cu(s) → Mn²+ (aq) + 2H₂O(1) + Cu²+ (aq) Express your answer in kilojoules to two significant figures. 17| ΑΣΦΑ AGixn = Submit Part B Request Answer ? Pb²+ (aq) + Mg(s) → Pb(s) + Mg²+ (aq) Express your answer in kilojoules to three significant figures. kJ
Part C Br₂ (1) + 2Cl(aq) → 2Br¯(aq) + Cl₂ (g) Express your answer in kilojoules to two significant figures. AGix -- ΑΣΦ wwwww ? kJ
Transcribed Image Text:Part C Br₂ (1) + 2Cl(aq) → 2Br¯(aq) + Cl₂ (g) Express your answer in kilojoules to two significant figures. AGix -- ΑΣΦ wwwww ? kJ
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