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Equilibrium:
What Is It?
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Characteristics
of Equilibrium
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- A
Dynamic State In Which Two Opposing Processes Take Place At The Same Time
And Rate
- Equal
rates... not necessarily equal amounts of reactants and products
- Systems
looks static as if nothing is happening
- System
at Equilibrium at the molecular level is dynamic, there is continual
change
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http://mw.concord.org/modeler1.3/mirror/chemistry/equilibrium.html
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The animated gif shown here could be
representing the following equilibrium.
N2 +
O2 
2 NO
let N = blue
let O = green
Notice at all times
there are N2 molecules and O2 molecules and NO
molecules present.
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Chemical
Equilibrium
N2+ 3H2 
2NH3
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Examples
of
Equilibrium
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Physical Equilbrium
Melting ice and
freezing ice at 0°C
H2O(l)
H2O(s) + energy
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| 1.
When a restaurant get full, the number of tables being
seated = the number of tables being vacated. |
Some
Everyday Analogies of Equilibrium... |
| 2.
Athletic team substitutions such as line changes in
hockey... when one person goes off another goes in. |
| 3.
Carrying Capacity of an Ecosystem.... For every organism
that lives, a different one must die |
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Symbols
Used To Describe Equilibrium |
System is at
Equilibrium |
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Forward Reaction is
Favored |
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Reverse Reaction is
Favored
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