4.3 rates Flashcards
how does a reaction occur between elements
if the reactant particles collide with each other with enough energy
what are four factors which affect the rate of reaction
Solid surface area
solution concentration
Temperature
Catalysts
how does increasing surface area increase the rate of reaction
- More of the solid is exposed to the other particles
- so the Collison frequency is higher
-So there are more successful collisions per unit time
how does increasing the solution Concentration increase the rate of reaction
-There are more particles per unit volume
- so the Collison frequency is higher
- so there are more successful Collison’s per unit time
how does increasing the temperature increase the rate of reaction
-the particles have more Kinetic energy
- so the percentage of collisions with enough energy is higher
- so there are more successful collisions per unit time
how does a catalyst increase the rate of reaction
-They provide an alternative route with a lower activation energy
-so the percentage of collisions with enough energy is higher
- so there are more successful collisions per unit time
The graph with a straight- line through the origin means……
the rate is proportional to the concentration
How do you increase the Surface Area
Breaking it into smaller pieces (grinding it up)
What are catalyst
Increase the rate- speed up the reaction
Remain chemically unchanged
provide an alternate route with a lower activation energy
