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9 Cards in this Set
- Front
- Back
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Dynamic equilibrium |
Rates of the forward and backward reaction are equal. Concentrations of reactants and products are constant. |
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Reversible reaction |
Reaction that goes in both directions at the same temperature |
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Position of equilibrium |
Ratio of product to reactant concentrations |
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Le Chateliers Principle |
When conditions in a system at equilibrium are altered, position of equilibrium shifts to oppose the change |
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Temperature |
Equilibrium shifts in endothermic direction Decrease in equilibrium yield for exothermic reaction Increase in equilibrium yield for endothermic reaction Due to higher activation energies |
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Pressure |
Only affects reactions with gases. Increase will shift to side with fewest gaseous moles. Decrease will shift to side with most gaseous moles. |
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Concentration |
Only applies to reactants that are dissolved in a solvent. If conc of a reactant increases, equilibrium will shift to remove that substance. If conc of a reactant decreases, equilibrium will shift to produce more of that species. |
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Catalyst |
No effect on the position of equilibrium. Lowers the activation energy of the reaction, so the rate of attainment increases. |
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catalyst effect on exothermic reactions |
High temperature results in low equilibrium yield that is reached quickly Low temperature results in high equilibrium yield reached slowly Catalysts allow reaction to be faster at lower temperatures |
