Factors Affecting Reaction Rate
Potential Energy Diagram
Kinetics
Collision Theory
100
Three factors that affect the reaction rate of a chemical reaction.
What are concentration, surface area, and temperature?
100
Which letter represents the potential energy of the reactants?
B
100
As the number of effective collisions between reacting particles increases, the rate of the reaction...
a. increases
b. decreases
c. remains the same
increases
100
What happens if a collision has correct orientation but insufficient energy?
No reaction!
200
It increases the kinetic energy of that substance, resulting in a greater number of collisions.
How does temperature affect reaction rate?
200
Which letter represents the potential energy of the products?
F
200
The energy needed to start a chemical reaction is called?
Activation energy
200
What is formed from a collision?
What is an activated complex or transition state, which are the same.
300
This alters the amount of collisions taking place within a reaction, increasing reaction rate.
How does concentration affect reaction rate?
300
C
300
What will change when a catalyst is added to a chemical reaction?
Activation energy in the forward or reverse reaction
or
The potential energy of the activated complex
300
collision theory states...
What is That in order for molecules to react, they must collide
400
The formula used to calculate average reaction rate.
What is Δ[reactant]/Δtime ?
400
D
400
In what type of reaction do the products of the reaction always possess more potential energy than the reactants?
Endothermic
400
three things that must happen for the collision theory to happen
What is Particles must collide, Collisions must have the correct orientation, Collisions must have sufficient energy?
500
Outline why the rate of the reaction decreases with time.
What is that the limiting reactant is used up and less product is formed?
500
Explain, in terms of the function of a catalyst, why the curves on the potential energy diagram for the catalyzed and uncatalyzed reactions are different
The curves are different because in a catalyzed reaction, the activation energy is less than an uncatalyzed reaction.
500
Explain, in terms of kinetic energy and collision, how increasing the temperature of a reaction will increase the rate of that reaction.
As you increase the temperature of a reaction, the kinetic energy (speed) of particles increases and therefore increases the frequency and effectiveness of collisions.
500
Give two reasons why the rate of a chemical reaction increases with increasing temperature.
Average KE increases with temperature
Collisions occur with greater energy or more have required EA
Average velocity increases with temperature
More collisions occur