CL4 - The Importance of Rate Equations

Question 1

Units for these overall order of reactions:

• zero
• first
• second

Answer 1

zero - k = mol dm-3 s-1
first - k = s-1
second - k = dm3 mol-1 s-1

Question 2

factors + units for Arrhenius equation
T =
R =
Ea = 
e = 
A =

Answer 2

T = temperature (K)
R = gas constant 8.31
Ea = activation energy (J mol-1)
e = mathematical constant
A = frequency factor

Question 3

Which variables of the Arrhenius equation can change

Answer 3

Ea + T

rest are constants

Question 4

lnk = …..

arrhenius with natural log

Answer 4

lnk = lnA - Ea/RT

lnk = -Ea/R x 1/T + lnA

y = mx + c

Question 5

effect of a catalyst

Answer 5

a catalyst provides a ROUTE for the reaction with a LOWER AE