Rate of reaction Flashcards
1
Q
Factors influencing rate of reaction
A
- SA of solid reactant ( size of particles )
- temperature
- concentration
- pressure ( gaseous reactions )
- light
- catalyst
2
Q
Effect of SA on rate of reaction
A
- the smaller the size of the solid reactant, the greater SA contact with other reactant
- greater frequency of collisions between particles
- rate of reaction increases
3
Q
Effect of temperature on rate of reaction
A
- increase in temperature
- increase in kinetic energy
- greater frequency of collisions between particles
- rate of reaction increases
4
Q
Effect of concentration on rate of reaction
A
- increase in concentration
- reacting particles more crowded
- increase in frequency of collisions of particles
- rate of reaction increases
5
Q
Effect of pressure on rate of reaction
A
- only gaseous reaction ; only gases are compressible
- pressure increased
- reacting molecules brought closer together
- greater frequency of collisions
- rate of reaction increases
6
Q
Effect of light on rate of reaction
A
energises some molecules
7
Q
Reactions that use light energy
A
- between hydrogen & chlorine
- between alkane & chlorine
- photosynthesis
- photography
