GOALS 66-68 Overhead Outlines

GOALS 66-68 Overhead Outlines - more (+) reduction...

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GOAL 66: Key Idea: You can easily relate the cell potential to other thermodynamic quantities. G o = -nFE o cell where n = the number of moles of electrons transferred in the reaction and F is the Faraday constant. Note: A positive cell potential gives a negative change in Gibb’s Free Energy as expected for a spontaneous reaction. E o cell = (RT/nF) lnK eq GOAL 67: Key Idea: You can use half-reactions and their reduction potentials to calculate the cell potential.
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Using a table of reduction potentials like Appendix 6 to identify the stronger oxidizing and reducing agents. Notice that the better oxidizing agent has the
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Unformatted text preview: more (+) reduction potential. When you reverse the other half-cell reaction you change the sign on the potential as you turn it into an oxidation potential. Your goal for a spontaneous cell reaction is to get a (+) cell potential. If you need to multiply one of the half-reactions to write a balanced overall equation, do NOT multiply the cell potential by that factor. GOAL 68: Key Idea: You can easily consider cells not under standard conditions using the Nernst Equation: E cell = E o cell (RT/nF) lnQ...
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This note was uploaded on 03/29/2010 for the course CHEM 1123 taught by Professor Paul during the Spring '06 term at Arkansas.

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GOALS 66-68 Overhead Outlines - more (+) reduction...

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