4.2.8: The Arrhenius Equation Flashcards
1
Q
What does the Arrhenius equation help work out?
A
what happens to the rate constant if various conditions, such as temperature or activation energy change
2
Q
As the activation energy increases, k…
A
gets smaller
large Ea = slow rate
3
Q
As the temperature rises, k…
A
increases
4
Q
Units of: (in the arrhenius equation)
Ea
T
A
Ea = J mol-1 T = K
5
Q
Meaning of: (in the arrhenius equation)
R
A
A
R = gas constant, 8.31 J K-1 mol-1 A = the arrhenius constant
6
Q
Arrhenius plot graph
A
ln k against 1/T
7
Q
Y-intercept in the arrhenius plot graph is equal to
A
ln A
8
Q
Gradient of a straight line on the arrhenius plot graph
A
-Ea/ R
