作者kirarapon (我要吐了...............)
看板TransBioChem
標題[問題] 台大94C電熱化學
時間Sun Jul 4 19:56:48 2010
我不知道像這樣要怎麼寫陰陽極....
III.A galvanic cell is constructed as follows:
Zn│0.1M ZnSO4││0.1M KMnO4,0.01M Mn2+,[H+]=1.0M│Pt
Answer the following questions using the thermodynamic data(at 25C) below
Zn(s) Zn2+(aq) Mn2+(aq) MnO4-(aq) H+(aq) H2O(l)
______________________________________________________________________________
ΔHfo(kJ*mol-1) 0 -154 -221 -541 0 -286
Sfo(J*K-1*mol-1) 42 -112 -74 191 0 70
(A)Write the balanced cell reaction and indicate the oxidizing and reducing
agent.
(B)Find ΔHo and ΔSo for the cell reaction at 25度C
(C)Calculate ΔGo and Ecello for the cell reaction at 25度C
(D)Calculate the cell potential for the constructed galvanic cell at 25度C
(E)If the cell generates a constant current of 1.0A for the first 5 minutes,
find the rate of disappearance (in M/min) at 25度C for MnO4- during this
period of time (F=96485 coulombs)
因為第一題的式子列不出來
後面的題目就不曉得要怎麼做
請問像這類題目
下面的小題是可以直接用題目的數字資料算出嗎?
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1F：推 nodal:從給的條件先寫半反應 對照寫很好寫的 07/04 20:37
2F：→ nodal:Zn→Zn2+ + 2e- 跟 Mn7+ + 5e- → Mn2+ 07/04 20:42
3F：→ nodal:合起來"5Zn"+"2MnO4-"→ "5Zn2+"+"2Mn2+" 發現多O 07/04 20:45
4F：→ nodal:補H進去 "5Zn"+"2MnO4-"+"16H+"→"5Zn2+"+"2Mn2+"+"8H2O" 07/04 20:47
5F：→ nodal:完成 07/04 20:47
6F：推 nodal:下面的題目只要抓到總共有10個電子轉移就能算了 07/04 20:49
7F：→ kirarapon:我會了!!非常感謝!! 07/05 17:22