Chem133 Chapter20

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Author:
ColeJT1227
ID:
252428
Filename:
Chem133 Chapter20
Updated:
2013-12-10 19:19:32
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Chem Chemistry 133 Chem133 Chemistry133 Test3 Foust
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Chapter20
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  1. When is a reaction spontaneous?
    when it proceeds under the specified conditions.
  2. What is the entropy of a system?
    What are its units?
    • k = R/avagadro's
    • W= number of microstates
    • J/°K
  3. What is the change of entropy in a system when heat is added?
  4. What is standard molar entropy?
    • Because entropy depends on amount of substance we define it to have units of J mol-1 K-1
  5. Calculate the standard entropy of a reaction
    • Where m and n are moles of products and reactants
  6. Calculate the ⌂Ssurr
    • At constant pressure:
  7. Calculate the free energy of a system.
  8. Calculate the ⌂Gsys
    What can it tell us?
    • ⌂G<0: Spontaneous
    • ⌂G=0: Equilibrium
    • ⌂G>0: Nonspontaneous
    • How much work can be done by (or needs to be done to) a system
  9. What is another way to calculate ⌂G?

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