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Physical Chem Q: What's Chemical Potential?
- Thread starter l Xes l
- Start date
DivideBYZero
Lifer
sao123
Lifer
this concept is not that difficult.
Background information... any time a reaction occurs... energy is either absorbed or released.
Here is a ficticious example....
Imagine having a pile of balls. A ball can be one of two colors (red or blue). Every minute exactly 1 ball will change color (red->blue or blue->red) until there are exactly 2 blue balls for every 1 red ball. For a red ball to become blue, energy is released, for a blue ball to become red, energy must be absorbed.
So you start with a pile of 30 red balls. After 20 minutes, you will now have 20 blue balls and 10 red balls. No further changes will occur. This is called equilibrium....
If I add 6 new red balls to the equilibrium.... some of those balls are going to have to turn blue to reach a new equilibrium. Chemical potential is defined how much energy will be released or absorbed to reach equilibrium again.
4 balls will change to blue, so 4 units of energy will be released.
If I add 6 new blue balls to the equilibrium.... some of those balls are going to have to turn red to reach a new equilibrium. 2 balls will change to red, so 2 units of energy will be absorbed.
Background information... any time a reaction occurs... energy is either absorbed or released.
Here is a ficticious example....
Imagine having a pile of balls. A ball can be one of two colors (red or blue). Every minute exactly 1 ball will change color (red->blue or blue->red) until there are exactly 2 blue balls for every 1 red ball. For a red ball to become blue, energy is released, for a blue ball to become red, energy must be absorbed.
So you start with a pile of 30 red balls. After 20 minutes, you will now have 20 blue balls and 10 red balls. No further changes will occur. This is called equilibrium....
If I add 6 new red balls to the equilibrium.... some of those balls are going to have to turn blue to reach a new equilibrium. Chemical potential is defined how much energy will be released or absorbed to reach equilibrium again.
4 balls will change to blue, so 4 units of energy will be released.
If I add 6 new blue balls to the equilibrium.... some of those balls are going to have to turn red to reach a new equilibrium. 2 balls will change to red, so 2 units of energy will be absorbed.
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