Quiz 9 Key - Chemistry 201X: Quiz #9 Name:_KEY_...

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Chemistry 201X: Quiz #9 November 30, 2007 Name:_____KEY_________________________ INFORMATION: E ° = 0 red E (reduction) 0 red E (oxidation) G ° = nF E ° E = E ° (0.0592/ n ) log Q F = 96,500 coul/mol G ° = RT ln K R = 8.314 J/mol K (2) (10 points) A galvanic cell utilizes the following reaction: 2 Fe 3+ (aq) + H 2 (g) ⎯→ 2 Fe 2+ (aq) + 2 H + (aq) 2 H + (aq) + 2e ⎯→ H 2 (g) 0 red E = 0.00 V F e 3+ (aq) + e ⎯→ Fe 2+ (aq) 0 red E = +0.771 V (a) (2 pts) What is the standard emf (in V) for this reaction? E ° = 0 red E (Fe 3+ Fe 2+ ) 0 red E (H + (aq) H 2 ) = (+0.771 V) (0.00 V) = +0.771 V (b) (2 pts) What is the standard free energy (in kJ) of this reaction at 298 K? G ° = (2 mol)(96,500 coul/mol)(+0.771 V) =
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