Quiz 2

Question 1

The higher the reaction barrier(activation energy)

Answer 1

the slower the reaction

Question 2

reactions at higher temperatures

Answer 2

are faster reactions becasue
* molecules colide more frequently
* molecules collide with more energy

Question 3

Measuring intial rate

Answer 3

• slope of line at start of reaction
  rise/run
• 10-15% of the reaction progress

Question 4

Average reaction rate

Answer 4

(final consentration-inital consentration)/(final time- inital time)

Question 5

Calculating order

Answer 5

Question 6

Zero-order rate constant unit

Answer 6

M s^-1

Question 7

First-order rate constant unit

Answer 7

s^-1

Question 8

Second-order rate constant unit

Answer 8

M^-1 s^-1

Question 9

Integrated Rate Law graph
Zero Order

Answer 9

Question 10

Integrated Rate Law graph
First Order

Answer 10

Question 11

Integrated Rate Law graph
Second Order

Answer 11

Question 12

mechanism of a reaction

Answer 12

the detailed stepwise process of how we get from starting materials to the products

Question 13

Ea

Answer 13

“energy barrier to reaction”
Activation energy

Question 14

Large Ea

Answer 14

slow reaction

Question 15

Small Ea

Answer 15

Fast reaction

Question 16

ΔH

Answer 16

ΔE = change in energy
product energy - reactants energy

Question 17

ΔH < 0

Answer 17

favorable reaction

Question 18

ΔH > 0

Answer 18

Unfavorable reaction

Question 19

In reactions catalysts

Answer 19

lower the activation energy (lowers hump)

Question 20

Answer 20

k= rate constant
A= frequency factor
Ea= activation energy
R= gas constant
T= temperature in kelvin

Question 21

parts of arrhenius equation

Answer 21

Question 22

calculating Ea

Answer 22

Ea= slope of equation x R

Question 23

calculating A

Answer 23

Question 24

comparing activation energy at diff temps

Answer 24