Rate of reaction Flashcards
(6 cards)
1
Q
2 equations for rate of reaction:
A
amount of reactant used/time
amount of product formed/time
2
Q
Factors which affect the rates of chemical reactions:
A
- concentration
- pressure
- surface area
- temperature
- catalysts
3
Q
Collision theory:
A
chemical reactions can only occur when reacting particles collide with each other and with sufficient energy
4
Q
Activation Energy:
A
the minimum amount of energy that particles must have to react
5
Q
What increases the rate of collisions, therefore increasing the rate of reaction?
A
- increasing the concentration of reactants in a solution
- increasing pressure or reacting gases
- increasing the surface area of a solid
- increasing the temperature
6
Q
Catalysts:
A
- substances that speed up chemical reactions without being changed or used up during the reaction
- catalysts decrease activation energy, increasing proportion of particles with energy to react
- catalysts provide a different pathway for a chemical reaction that has lower activation energy
