The table above provides the half-reactions and standard reduction potentials needed to determine if an Al-air fuel cell can be constructed. Which of the following equations best supports the possibility of obtaining electrical energy from such a cell? Half-ReactionStandard Reduction Potential (V)Al(OH),(s) + 3 e- -+ Al(s) + 3 OH (ag)-2.31O2(9) + 2 H2O(1) + 4 e- → 4 OH (aq)+0.40 Acell = [+0.40 –(-2.31)] V and AG°(12 x 96,500 x 2.71)kJ%3Dran1,000cell = [+0.40 – (-2.31)] V and AG",(4 x 96,500 x 2.71)kJ1,000BE° cell = [-2.31 - (+0.40)] V and AG",(12x96,500x-2.71)CkJran1,000DE cell = [-2.31 - (+0.40)] V and AG",3x96,500x-2.71kJ1,000

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Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter18: Electrochemistry

Section: Chapter Questions

Problem 18.108QE: At 298 K, the solubility product constant for solid Ba(IO3)2 is 1.5 109. Use the standard reduction...

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The table above provides the half-reactions and standard reduction potentials needed to determine if an Al-air fuel cell can be constructed. Which of the following equations best supports the possibility of obtaining electrical energy from such a cell?

Half-Reaction
Standard Reduction Potential (V)
Al(OH),(s) + 3 e- -
+ Al(s) + 3 OH (ag)
-2.31
O2(9) + 2 H2O(1) + 4 e- → 4 OH (aq)
+0.40

A
cell = [+0.40 –(-2.31)] V and AG°
(12 x 96,500 x 2.71)
kJ
%3D
ran
1,000
cell = [+0.40 – (-2.31)] V and AG",
(4 x 96,500 x 2.71)
kJ
1,000
B
E° cell = [-2.31 - (+0.40)] V and AG",
(12x96,500x-2.71)
C
kJ
ran
1,000
D
E cell = [-2.31 - (+0.40)] V and AG",
3x96,500x-2.71
kJ
1,000

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