Rates of Reaction

What does rate of reaction tell us?

• How fast products turn into reactants

• How fast reactants turn into products

• If a reaction happens or not

• What happens during a reaction

What factors affect rate of reaction?

• Surface area

• Catalysts

• Temperature

• Concentration

• Time

What is activation energy?

• Energy needed to make chemicals spontaneously split apart

• Energy to activate chemicals

• Largest amount of energy particles have

• Smallest amount of energy particles need before they react

What is needed for particles to react?

• They must collide

• They must have enough energy

• They must be elements

• They must be compounds

If we increase the temperature, what happens to the rate of reaction?

• Nothing

• Decreases

• Increases

Particles that are at a higher temperature move ____________ then particles with a low temperature

Why does increasing concentration increase rate of reaction?

• Less particles moving around so more collisions

• More particles moving around so more collisions

• More particles moving around so less collisions

• Less particles moving around so less collisions

A higher surface area means....

• nothing

• higher rate of reaction

• lower rate of reaction

Which has the biggest surface area?

• Small particles

• Large particles

• elements

• compounds

What is the name of a special substance which can be added to a reaction to increase the rate of reaction?