kinetics

Question 1

straight line going downwards

Answer 1

if a straight line is obtained, the reaction is zero order with respect to [A]

Question 2

curve

Answer 2

if a curve is obtained, determine the half lives to check if the reaction is first order
- if half lives are (approximately) constant, the reaction is first order with respect to [A]

Question 3

effect of catalyst on rate of reaction

Answer 3

-providing an alternative reaction mechanism of lower activation energy
-number of particles having kinetic energy ≥ Ea’ increases
-catalyst is regenerated
-frequency of effective collisions between particles increases. rate of reaction increases

Question 4

effect of temperature on rate of reaction

Answer 4

• when temperature increases, the molecules increase in kinetic energy
• the number of molecules with kinetic energy ≥ activation energy Ea
• frequency of effective collisions between particles increases and hence the reaction rate increases

Question 5

order of reaction

Question 6

half life definition

Answer 6

half life is the time taken for the original concentration ( or amount) of a reactant to be halved