Rate of reaction question codes

Question 1

Explain the effects of changing temperature on the rate of reaction

Answer 1

1. Increased temperature increases the kinetic energy of the particles, causing them to move faster and collide more frequently.
   2The collisions that occur are more likely to have
   sufficient energy to overcome the activation energy barrier
2. So the rate of reaction is increased as there will be
   more successful collisions per second

Question 2

Explain the effects of adding a catalyst to the rate of reaction

Answer 2

1. The iron is added to act as a catalyst. This speeds up the rate of reaction because a catalyst provides an alternative pathway for the reaction with a lower activation energy level.
2. Therefore, more particles/collisions have sufficient energy to overcome the activation energy, and so there are more effective collisions /faster rate of reaction.

Question 3

Explain the effects of increasing the concentration on the rate of reaction

Answer 3

1. increases the number of particles available to react in a given volume.
2. So there will be more a greater number of effective collisions per second
3. resulting in an increased reaction rate

Question 4

Explain the effects of increasing surface area on the rate of reaction

Answer 4

1. Increasing the surface area increases the number of particles available to collide.
2. so there will be more effective collisions per second
3. resulting in an increased reaction rate