Chemical Kinetics

Question 1

collision theory

Answer 1

• for chemical reaction to occur:
• reactants must collide
• in correct orientation
• w/ sufficient KE (above Ea)

Question 2

activation E

Answer 2

E required for reactants to form products (Ea)

Question 3

rate of reaction

Answer 3

• increase in product conc over unit time

- decrease in reactant conc over unit time

Question 4

ΔH

Answer 4

diff. betw system E and E of system when products = formed

Question 5

what affects rate of reaction?

Answer 5

• temp
• catalyst
• conc
• SA

Question 6

how does temp affect rate of reaction?

Answer 6

> temp. = > KE of particles = > frequency of collisions = > no. successful collisions = faster reaction

Question 7

how does the presence of a catalyst affect rate of reaction?

Answer 7

-may provide alternative pathway w/ lower Ea, increasing probability of proper orientation = > frequency of successful collisions = faster reaction

Question 8

how does concentration affect rate of reaction?

Answer 8

-higher conc = more frequent collisions = faster reaction

Question 9

how does SA affect rate of reaction?

Answer 9

-smaller solid particles cause faster reaction bc surface = where reaction occurs