Question 1

The following half-reactions occur in the mercury battery used in calculators. If E°cell = 1.357 V, calculate the equilibrium constant for the cell reaction at 25°C. (Assume the stoichiometric coefficients in the cell reaction are all equal to 1.)  HgO(s)  + H2O(l)  + 2e- cell = 1.357 V, calculate the equilibrium constant for the cell reaction at 25°C. (Assume the stoichiometric coefficients in the cell reaction are all equal to 1.)  HgO(s)  + H2O(l)  + 2e-   Hg(l)  + 2OH-(aq)  ZnO(s)  + H2O(l)  + 2e-   Zn(s)  + 2OH-(aq)  A)  9.4 × 1022 B)  7.5 × 1045 C)  6.4 × 1063 D)  7.8 × 1091 E)  > 9.9 × 1099" class="answers-bank-image d-inline" rel="preload" > Hg(l)  + 2OH-(aq) 
ZnO(s)  + H2O(l)  + 2e- cell = 1.357 V, calculate the equilibrium constant for the cell reaction at 25°C. (Assume the stoichiometric coefficients in the cell reaction are all equal to 1.)  HgO(s)  + H2O(l)  + 2e-   Hg(l)  + 2OH-(aq)  ZnO(s)  + H2O(l)  + 2e-   Zn(s)  + 2OH-(aq)  A)  9.4 × 1022 B)  7.5 × 1045 C)  6.4 × 1063 D)  7.8 × 1091 E)  > 9.9 × 1099" class="answers-bank-image d-inline" rel="preload" > Zn(s)  + 2OH-(aq)

Accepted Answer

A)   9.4 × 1022
B)   7.5 × 1045
C)   6.4 × 1063
D)   7.8 × 1091
E)   > 9.9 × 1099F) B) and D)
G) A) and D)

Question 2

Consider the non-aqueous cell reaction 2Na(l)  + FeCl2(s)  2(s)    2NaCl(s)  + Fe(s)  For which E°cell = 2.35 V at 200°C. G° at this temperature is A)  453 kJ. B)  -453 kJ. C)  907 kJ. D)  -907 kJ. E)  none of the above." class="answers-bank-image d-inline" rel="preload" > 2NaCl(s)  + Fe(s) 
For which E°cell = 2.35 V at 200°C. G° at this temperature is

Accepted Answer

A)   453 kJ.
B)   -453 kJ.
C)   907 kJ.
D)   -907 kJ.
E)   none of the above.F) All of the above
G) B) and E)

Exam 21: Electrochemistry: Chemical Change and Electrical Work

Consider the non-aqueous cell reaction 2Na(l) + FeCl₂(s) 2NaCl(s) + Fe(s) For which E°_cell = 2.35 V at 200°C. G° at this temperature is

Correct Answer
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Correct Answer
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Exam 21: Electrochemistry: Chemical Change and Electrical Work

Consider the non-aqueous cell reaction 2Na(l) + FeCl2(s) 2NaCl(s) + Fe(s) For which E°cell = 2.35 V at 200°C. G° at this temperature is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Consider the non-aqueous cell reaction 2Na(l) + FeCl₂(s) 2NaCl(s) + Fe(s) For which E°_cell = 2.35 V at 200°C. G° at this temperature is

Correct Answer
verified

Correct Answer
verified