Chemical equilibria -2
- Created by: Shannon
- Created on: 02-05-14 15:28
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- Chemical equilibria
- Chemical equilibria are dynamic
- Both the forward and backward reactions are occurring at the same rate
- The ratio of reactants:products does not change
- In order for a dynamic equilibrium to be established, the reaction must take place in a closed system
- Le Chatelier's principle
- If a system at equilibrium is disturbed, the system's equilibrium will shift to oppose the effects of the change
- Changes to equilibrium
- Pressure
- Increase
- The equilibrium will shift to the side with the fewest particles
- Decrease
- The equilibrium will shift to the side with the most particles
- Increase
- Temperature
- "heat favours the endothermic direction"
- Increase
- Increasing the temperature means adding more heat
- Equilibrium shifts in the endothermic direction to absorb heat
- Increasing the temperature means adding more heat
- Decrease
- Decreasing the temperature means removing heat
- Equilibrium shifts in the exothermic direction to replace the heat
- Decreasing the temperature means removing heat
- Concentration
- Increase
- Equilibrium will shift to get rid of the extra reactant/product
- Decrease
- Equilibrium will shift to create more of the reactant/product
- Increase
- Catalysts do not affect the position of equilibrium
- Pressure
- Chemical equilibria are dynamic
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