(U2) Kinetics Flashcards
1
Q
What is reaction rate? (2)
A
- The change of the concentration (amount) of a reactant or product
- with respect to time
2
Q
What is a catalyst? (2)
What does it do?
A
1.
- A substance which increases the rate of a chemical reaction
- but does not get used up
2.
- provides an alternate reaction pathway with lower activation energy
3
Q
What is activation energy?
A
The minimum amount of energy required for a reaction to occur
4
Q
In terms of particles, how does concentration affect the rate of a reaction? (5)
A
- increased concentration increases rate of reaction
- more acid particles in the same volume
- more chance of collisions
- resulting in more successful collisions
- in a given time
5
Q
In terms of particles, how does pressure affect the rate of a reaction? (5)
A
- increased pressure increases rate of reaction
- more particles in the same volume
- more chance of collisions
- resulting in more successful collisions
- in a given time
6
Q
In terms of particles, how does surface area affect the rate of a reaction? (5)
A
- increased surface area increases rate of reaction
- more particles on the surface exposed to the other reactant
- more chance of collisions
- resulting in more successful collisions
- in a given time
7
Q
In terms of particles, how does Temperature affect the rate of a reaction? (6)
A
- increased temperature increases rate of reaction
- particles gain kinetic energy
- particles move faster
- more chance of collisions
- resulting in more successful collisions (enough activation energy)
- in a given time
8
Q
A
