collision theory

Question 1

What is the collision theory

Answer 1

For a chemical reaction to happen:

Particles must collide

They must have enough energy (called activation energy)

If particles don’t collide or don’t have enough energy, nothing happens.

Question 2

what increases the rate of reaction and frequency of collision?

Answer 2

Increasing the concentration of reactants in solution, the pressure of
reacting gases, and the surface area of solid reactants increases the
frequency of collisions and so increases the rate of reaction.

Question 3

what happens if there is an Increase Concentration (in a solution)

Answer 3

More particles in the same space

Particles collide more often

👉 Rate of reaction increases

Question 4

what happens if the pressure is higher

Answer 4

Gas particles are closer together

More collisions per second

👉 Rate of reaction increases

Question 4

What happens if there is an of Increase Temperature

Answer 4

Particles move faster

More collisions, and more of them have enough energy

👉 Rate of reaction increases a lot

Question 5

what happens if there is an increase of surface area e.g. using smaller solid pieces

Answer 5

More particles are exposed to react

More space for collisions to happen

👉 Rate of reaction increases