Term
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Definition
| The change in concentration of a reactant or product over time |
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Term
| Define Instantaneous reaction rate |
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Definition
| The value of the rate at a particular time, can be obtained by computing the slope of a ling tangent to the curve at that point |
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Term
| State the collision theory and relate to factors that affect the reaction rate |
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Definition
- two molecules must collide
- must collide with the proper angle
- must collide with enough energy to overcome existing bonds Activation Energy= minimum Energy needed
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Term
| Identify how rate will change if the concentration of reactants changes |
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Definition
- the number of particles in a given volume also affects the rate at which reactions occur
- cramming more particles into a fixed volume increasess the concentration fo reactants, the collision frequency and therefore the reaction rate
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Term
| Describe the effects of a catalyst in a chemical reaction |
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Definition
- an increase in temperature is not always the best way to increase the rate of a reaction a catalyst, if once can be found, is often better
- a catalyst is a substance that increases the rate of a reaction without being used up itself during the reaction
- calysts permit reactions to proceed at a lower activation enegy than is normally required
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