Consider the hydrogen-oxygen fuel cell where H2(g) + O2(g) = H20() DG° = -237.18 kJ/mol H2 Which of the following statements is(are) true? 1. At standard conditions, the maximum work the fuel cell could do on the surroundings is 237.18 kJ/mol. II. In the real world, the actual amount of useful work the cell can do is less than 237.18 kJ. More energy is dissipated as waste heat in the fuel cell than in the reversible pathway. II. Select one: O a. I O b. II O c. None of the statements is true. O d.I O e. 1, II, and II In which of the following cases can E° be equal to zero? In any cell at equilibrium II. In a concentration cell II. E° can never be equal to zero. 1. Select one: O a. T only O b. II O c. I and || O d. Il only
Consider the hydrogen-oxygen fuel cell where H2(g) + O2(g) = H20() DG° = -237.18 kJ/mol H2 Which of the following statements is(are) true? 1. At standard conditions, the maximum work the fuel cell could do on the surroundings is 237.18 kJ/mol. II. In the real world, the actual amount of useful work the cell can do is less than 237.18 kJ. More energy is dissipated as waste heat in the fuel cell than in the reversible pathway. II. Select one: O a. I O b. II O c. None of the statements is true. O d.I O e. 1, II, and II In which of the following cases can E° be equal to zero? In any cell at equilibrium II. In a concentration cell II. E° can never be equal to zero. 1. Select one: O a. T only O b. II O c. I and || O d. Il only
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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Transcribed Image Text:Consider the hydrogen-oxygen fuel cell where
H2(g) + O2(g) = H20() DG° = -237.18 kJ/mol H2
Which of the following statements is(are) true?
1.
At standard conditions, the maximum work the fuel cell could do on the
surroundings
is 237.18 kJ/mol.
II.
In the real world, the actual amount of useful work the cell can do is less than
237.18 kJ.
I.
More energy is dissipated as waste heat in the fuel cell than in the reversible
pathway.
Select one:
O a. I
b. II
O c. None of the statements is true.
d. I
O e. I, II, and II
In which of the following cases can E° be equal to zero?
1.
In any cell at equilibrium
II. In a concentration cell
I. E° can never be equal to zero.
Select one:
a. I only
O b. II
O c. I and ||
O d. Il only
Transcribed Image Text:The standard free energies of formation of several aqueous species are
kJ/mol
H*(aq)
H20()
CH;OH(aq)
HCOOH(aq)
-237
-163
-351
e
What is the standard reduction potential of methanoic acid in aqueous solution (that is,
for HCOOH + 4H* + 4e ® CH;OH + H;O)?
Select one:
О а. +0.13 V
O b. -0.13 V
O c. +0.17 V
O d. -0.25 V
O e. +0.25 V
Which of the following is the best reducing agent?
Cl, + 2e ® 2Cr
Mg? + 2e ® Mg
E° = 1.36 V
E = -2.37 V
2H* + 2e ® H2
E° = 0.00 V
Select one:
O a. Mg
O b. Cl2
Oc. Mg?+
O d. cr
O e. H2
How many minutes will take to plate out 140.00 g of Ni form a solution of NISO, using a
current of 2.250 amp? (1C = 1Ax1s)
Select one:
O a. 3409 min
O b. 478 min
O c. 2226 min
O d. 461 min
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