L29_Elec1

L29_Elec1 - Two hydrogens are walking down the street. One...

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Two hydrogens are walking down the street. One hydrogen says to the other: “You know, I think I lost an electron”. The other replies: “Are you sure?” The first says: “Yeah, I am positive.” Chapter 17: Electrochemistry
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Chapter 17: Electrochemistry The interchange of chemical and electrical energy Review: RedOx rxns (Ch. 11.4) Thermodynamics (Ch. 12)
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Chapter 17: Electrochemistry The interchange of chemical and electrical energy Electrochemical Cells Gibbs Free Energy and Cell Voltage Free Energy, Concentration and K: Nernst Equation Batteries and Fuel Cells Special topics: Methanol and bacterial fuel cells Nanoelectrodes 1 micrometer Shewanella
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Electric current: generated by electrons’ flow Redox rxns: involve transfer of electrons between reagents CuSO 4 + Zn = ZnSO 4 + Cu Half rxns: Cu 2+ + 2e -> Cu 0 reduction rxn Zn 0 –2e -> Zn 2+ oxidation rxn Cu 2+ is reduced <-> Cu 2+ is oxidizing agent Zn is oxidized <-> Zn is reducing agent Balancing redox rxns: see Chapter 11.4
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An oxidizing agent is a substance that 12345 0%
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This note was uploaded on 07/22/2008 for the course CHEM 115b taught by Professor Reisler during the Spring '08 term at USC.

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L29_Elec1 - Two hydrogens are walking down the street. One...

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