Lecture 4

Question 1

What is K in the Arrhenius Rate Law?

Answer 1

the rate constant

Question 2

What does the rate constant mean?

Answer 2

the frequency of collisions resulting in a reaction

Question 3

What is T in the Arrhenius Rate Law?

Answer 3

absolute temperature in Kelvins

Question 4

What is A in the Arrhenius Rate Law?

Answer 4

the pre-exponential factor, a constant for each chemical reaction

Question 5

What is Ea in the Arrhenius Rate Law?

Answer 5

the activation energy for the reaction (in the same units as RT)

Question 6

What is R in the Arrhenius Rate Law?

Answer 6

universal gas constant

Question 7

What is the Arrhenius Rate Law equation?

Answer 7

K=Ae^(-Ea/RT)

Question 8

In the Arrhenius Rate Law explains what happens to the other variables when Temperature increases?

Answer 8

(Ea/RT) decreases
(-Ea/RT) increases
lnk increases
K increases
kf and kr increases

Question 9

Rate constants (kf and kr) typically only increase when ___ is increased?

Answer 9

temperature

Question 10

Can Kc increase or decrease?

Answer 10

it can both increase or decrease depending on if the reaction is endo or exothermic

Question 11

Describe deltaHr when a reaction is exothermic?

Answer 11

deltaHr<0