Rates

Question 1

How does temp affect the rate of reaction

Answer 1

If temperature increases so does the kinetic energy of the particles which increases frequent collisions within a time period. A greater proportion of particles have the necessary activation energy so collisions are more successful

Question 2

How does pressure/concentration affect rate of reaction

Answer 2

If concentration/pressure is increased amount the of particles in the volume also increase this therefore increases frequent collisions, however increasing concentration doesn’t increase successful collisions as no energy is added

Question 3

How does surface area affect rate of reaction

Answer 3

An increase in surface area means more particles are available allowing more frequent collisions, however collisions are not more successful

Question 4

How does adding a catalyst affect reaction rate

Answer 4

A catalyst allows an alternative pathway with lower activation energy this means a larger proportion of particles now have the necessary activation energy, so collisions are more successful but not more frequent