Chapter 16 Speed of Reaction

Question 1

How does gradient affect speed of reaction?

Answer 1

-The steeper the gradient, the faster the speed of reaction
-The gentler the gradient, the slower the speed of reaction
-When graph is horizontal, the reaction has completed

Question 2

How does temperature affect speed of reaction?

Answer 2

-At higher temperature, the particles have higher kinetic energy and collide more frequently.
-More particles will have energy greater than or equal to the activation energy
-This increases the frequency of effective collisions and hence increases the speed of reaction

Question 3

How does size of particles affect speed of reaction?

Answer 3

-When the particle size of reactant decreases, the exposed surface area for collision to occur increases
-This increases the frequency of effective collisions and hence, increases, the speed of reaction

Question 4

How does concentration affect speed of reaction?

Answer 4

-At higher concentrations, particles are closer together and the number of reactant particles per unit volume increases
-This increases the frequency of effective collisions and hence increases the speed of reaction

Question 5

How does pressure affect speed of reaction?

Answer 5

-At higher pressure, particles are closer together and the number of reactant particles per unit volume increases
-This increases the frequency of effective collisions an hence increases the speed of reaction