Rates of Reaction

Increase in temperature causes the particles to

• slow down

• move faster

• stay apart from each other

• move in the correct order

Why does a higher concentration increase the rate of reaction?

• it increases the amount of reactants

• it lowers the activation energy

• it increases the energy of reactant particles

• it increases the frequency of collision

Why does a higher temperature increase the rate of a reaction?

• It increases both the frequency collision and energy of reactant particles

• It only increases the frequency of collision

• It only increases the energy of reactant particles

• It reduces the activation energy of the reaction

What is the rate of reaction?

• How fast a reaction is 
• How big a reaction is
• How loud a reaction is
• How much gas a reaction produces

Grinding an effervescent tablet into powder increases the rate of reaction due to increase of

• concentration

• total surface area

• temperature

• size

Catalyst helps to

• increase the amount of product obtained

• to lower the activation energy

• provide an alternative reaction route

• decrease the frequency of collision

Which factors increase the rate of a reaction?

• increasing temperature

• increasing concentration

• increasing total surface area

• All of these

Increasing pressure causes the reacting particles

• to bond together

• to repel from each other

• gain more kinetic energy

• to move closer together

Increasing the temperature gives particles more __________.

• time

• energy

• space

• frequency

As the frequency of ________________ collision increases, the rate of reaction increases.

• time

• speed

• effective

• efficient