RATES

Question 1

What is the effect of TEMPERATURE on the rate of reaction?

Answer 1

1)INCREASED TEMPERATURE increases the rate of a reaction
2)particles gain more kinetic energy, and move around faster
3) the particles collide more frequently
4) a greater proportion of the particles also have sufficient activation energy
5) more successful collisions per unit time

Question 2

What is the effect of SURFACE AREA on the rate of a reaction?

Answer 2

1) INCREASING the surface area INCREASES the RATE of reaction
2) There is a larger area exposed over which the particles can collide with each other
3) therefore there are more frequent collisions per unit time

Question 3

CONCENTRATION

Answer 3

1)Increasing the concentration of a solution, increases the rate of reaction
2) More particles in a fixed volume, therefore distance between particles is reduced
3) particles collide with each other more frequently,
4) there are a greater number of successful collision per unit time

Question 4

CATALYST

Answer 4

1) using a CATALYST increases the RATE OF REACTION
2) it provides an alternative pathway of lower activation energy for the reaction
3) greater proportion of particles have sufficient activation energy
4) more successful collisions per unit time

Question 5

PRESSURE

Answer 5

In gases only, the pressure increases the rate of a reaction
-forces the particles closer together
-they collide more frequently
-more successful collisions per unit time