Rate of Reactions

What factors affect reaction rates?
- Concentration
- Temperature
- Pressure
- Surface area
- Catalyst
- Light
What 3 things must be present for a reaction to occur?
- Reactants must collide effectively
- They must have enough activation energy
- The molecules must be alligned correctly when colliding
How does concentration affect the rate of reaction?
- At high concentration;
- There are more reactant particles per unit volume
- There's increase frequency of effective collisions
- Increased speed of reaction
How does an increased surface area affect the rate of reaction?
- More effective collision
- More area exposed for reaction to occur
- Increased reaction rate
How does temperature affect the rate of reaction?
- More of the particles get activation energy
- They move faster
- Increases the effectiveness of collision
- Increased speed of reaction
How does catalyst affect the rate of reaction?
- Lower the activation energy so more particles get it. This provides an alternative route or path for the reaction
- More effective collision
- Increased reaction rate
How does light affect the rate of reaction?
- Light energy can initiate or catalyse particular chemical reactions. More of the particles get activation energy
- Increased effectiveness of collision
- Increased rate of reaction

Author

giavanna14

317625

Card Set

Rate of Reactions

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Updated

2016-03-20T14:24:06Z

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