C8.3 Temperature and Rate of Reaction

According to collision theory, how does an increase in temperature affect the rate of reaction?

• It decreases the rate of reaction.

• It has no effect on the rate of reaction.

• It increases the rate of reaction.

• It stops the reaction completely.

What is the primary reason that increasing temperature increases the rate of reaction according to collision theory?

• It increases the concentration of reactants.

• It increases the energy of collisions between particles.

• It decreases the activation energy required.

• It changes the state of reactants.

Which of the following best describes activation energy?

• The energy required to start a reaction.

• The energy released during a reaction.

• The energy absorbed by the products.

• The energy lost to the surroundings.

In a practical experiment, if the temperature of a reaction mixture is increased from 20°C to 30°C, what is the expected effect on the rate of reaction?

• The rate of reaction will decrease.

• The rate of reaction will remain the same.

• The rate of reaction will increase.

• The reaction will stop.

What is the effect of temperature on the frequency of collisions between reacting particles?

• Temperature decreases the frequency of collisions.

• Temperature has no effect on the frequency of collisions.

• Temperature increases the frequency of collisions.

• Temperature causes collisions to become less effective.

When the temperature of a reaction increases, the rate of reaction _______.

Order these into how increasing temperature affects the rate of reaction

• Particles gain kinetic energy

• Particles move faster

• Particles collide more frequently

• The rate of reaction increases

Which graph shows the reaction which was performed at a higher temperature?

Sort the following into "Factors that affect the rate of reaction" and "Not factors that affect the rate of reaction"

Groups:

(a) Factors that affect

,

(b) Factors that do not affect

• Temperature

• Volume of the container

• Presence of a catalyst

• Colour of reactants

• Surface area

Higher temperature increases the rate of reaction because particles have more ​ (a)   and collide more ​ (b)   .

• energy
• frequently
• size
• heavily