Ch 14

Question 1

The rate law for a chemical reaction:

Answer 1

Must be determined experimentally

Question 2

Rate Constant

First order

Answer 2

1/s or s^-1

Question 3

Rate Constant

Second order

Answer 3

1/M 1/s or m^-1 s^-1

Question 4

Rate Constant

Third order

Answer 4

1/M^2 1/s or m^-2 s^-1

Question 5

Rate Constant

Zero order

Answer 5

K= m/s or m s^-1

Question 6

Chemical Reaction rates are dependent on which of the following?

Answer 6

Frequency of Collisions
Energy with which molecules collide
Orientation of reacting molecules
Magnitude of the rate of constant k

Question 7

Catalytic converter in your car is an example of

Answer 7

A heterogenous catalyst

Solid acting on gas

Question 8

Catalysts:

Answer 8

Change reaction mechanism for a reaction
Lower activation energy barrier
Remains unchanged after completion
May be converted into intermediate species during reaction
Don't need to be in same phase

Question 9

Elementary Step

Answer 9

Single step
Number in front of A and B become exponents

Ie 2A + B -> C = A^2 B

Question 10

Why does a reaction occur faster at higher temperatures?

Answer 10

Higher average kinetic energies

Frequency of collisions increases

Question 11

What determines how fast a reaction will occur

Answer 11

Magnitude of activation energy barrier

Question 12

Principles of Chemical Kinetics

Answer 12

Increasing reactant concentration OFTEN results in rate increase

Catalysts increase rate of reactions

Reactions tend to occur faster at higher temperatures

Question 13

Exothermic is

Answer 13

Thermodynamically favorable