CHM135H1 Study Guide - Final Guide: Alkaline Battery, Standard Hydrogen Electrode, Concentration Cell

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University of Toronto
St. George
CHM135H1
Chemistry: Physical Properties
Fall 2017
Final Exam
Exam Guide
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CONTENTS
Exam Guide Covers the Following Topics:
Unit 3
Gibbs Free Energy
Electrochemistry
Electrochemical Cells
Batteries
Batteries and Corrosion
Electrolysis
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Review: Gibbs Free Energy
System Free Energy as a Function of reaction Progress
   
o  

 is constant for a given reaction
 depends on product-reactant ratio
oIts value is indicated by the slope as the system approaches equilibrium, 
approaches zero
Link Between Thermodynamics and Equilibrium Revisited
Another view of the relationship between free energy change and equilibrium
We know that:     and   
Combining these, we can write:
o  
o 
If  , the process proceeds spontaneously to the right
  
 
If  , the process is at equilibrium
  
 
If  , the process proceeds spontaneously to the left
  
 
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