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ID: 1059170 • Letter: P
Question
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25. Which of the following reactions would be the most spontaneous at 298 K? Eocell +0.98 V A) A 2 C; cell F -0.030 V B) A B3 2C; Eocell +0.15 V C) A, B 3C; cell +1.22 V D) A B C; E) more information is required to determine 26. Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25 C. Mg(e) l 2+ (2.74 M) ll Cu (aq) (0.033M) I cus) Mgoso g(aq) 2.37 V +0.34 V (aq) (s) A) -2.80 V B) +2.62 V C) +2.71 V D) +2.12 V E) -1.94 V
Explanation / Answer
25)
G = - n*F*Eocell
if Eo cell will be more positive, G will be more negative and hence reaction will be more spontaneous
Largest value of Eo is for D
Answer: D
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