Lecture24_upload - I=Q/t S = kB log W Go = - n F Eo ln Q +...

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Unformatted text preview: I=Q/t S = kB log W Go = - n F Eo ln Q + RT Go Go = Ho T So G= ELECTROCHEMISTRY s) (Tsys) (C) q = (mas Go = - RT l n Keq [C]c[D]d Q= qrev = T Eocell = Eocathode - Eoanode [A]a[B]b Cu (s) + 2 Ag+ (aq) Cu2+ (aq) + 2 Ag (s) Alessandro Volta 1745 - 1827 Neural Network Neuron Important OxidationReduction Reactions C + O2 CO2 Carneys Point Coal Plant Carneys Point, NJ Propellants 2 H2 + O2 2 H2O 10 Al + 6 NH4ClO4 4 Al2O3 + 2 AlCl3 + 3 N2 + 12 H2O People Amanda Beard C6H12O6 + 6 O2 6 CO2 + 6 H2O Corrosion ($600 billion to correct) Corrosion is a multibillion dollar problem. 4 Fe + 3 O2 + 2 H2O 4 FeO(OH) (Catalyzed by Cl-) The steel framework of an east coast condominium after only 10 years. There are four more units above this bottom unit. Assign an oxidation number to Mn and Cr in : KMnO4 , [Cr2O7]2- A. + 7 , + 7 C. + 7 , + 8 E. + 5 , + 6 B. + 7 , + 6 D. + 6 , + 7 Example Balance the following redox reaction: __ Al3+ (aq) + __ Br - (aq) __ Al (s) + __ Br2 (l) Example (in acid solution): VO2+(aq) + Zn(s) VO2+(aq) + Zn2+(aq) Example (in basic solution): Aluminum metal is oxidized in a basic solution, with water serving as the oxidizing agent. The products of the reaction are Al(OH)4-(aq) and H2(g). Write a balanced net ionic equation for this reaction. Researchers are developing voltaic cells based on the reaction between aluminum and sulfur under basic conditions. Al(s) + S(s) + OH- + H2O Al(OH)3(s) + HS-(aq) How many moles of Al(OH)3 are produced by the reduction of 1 mol of S(s) ?: A. 1 B. 2 C. 3 D. 4 E. 0.67 Clicker question Researchers are developing voltaic cells based on the reaction between aluminum and sulfur under basic conditions. Al(s) + S(s) + OH- + H2O Al(OH)3(s) + HS-(aq) The oxidizing agent is: a. Al b. S c. H2O d. OH- Clicker question Balance the reaction: Al(s) + S(s) + OH- + H2O Al(OH)3(s) + HS-(aq) How many moles of Al(OH)3 are produced by the reduction of 1 mol of S(s) ?: a. 1 b. 2 c. 3 d. 4 e. 0.67 ...
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This note was uploaded on 02/27/2012 for the course CHEM 116 taught by Professor Stevenson during the Spring '08 term at Purdue University-West Lafayette.

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Lecture24_upload - I=Q/t S = kB log W Go = - n F Eo ln Q +...

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