arrhenius equation

Question 1

what does the arrhenius equation do?

Answer 1

links activation energy and temperature to the rate constant

Question 2

what is arrhenius equation?

Answer 2

k = Ae (power) -Ea / RT

Question 3

what is k?

Answer 3

rate constant

Question 4

what is A?

Answer 4

arrhenius constant

Question 5

what is e?

Answer 5

exponential factor
e(power)x on calculator

Question 6

what is Ea?

Answer 6

activation energy (J)

Question 7

what is R?

Answer 7

gas constant (JK-1mol-1)
8.314

Question 8

what is T?

Answer 8

temperature (K)

Question 9

explain the relationship between k and Ea

Answer 9

as Ea decreases, k increases
- as activation energy drops, rate of reaction increases as more particles have enough energy to collide

Question 10

explain the relationship between k and temperature

Answer 10

as temperature increases, k increases
- more particles have enough kinetic energy to collide so rate of reaction increases

Question 11

summarise the steps in calculating activation energy using arrhenius

Answer 11

take natural log of both sides
- to remove exponential
lnK= lnA -Ea/RT

rearrange
Ea/RT = lnA - lnK
Ea = RT x (lnA-lnK)

substitute numbers into calculator