Arrhenius equation

Question 1

what does the Arrhenius equation show?

Answer 1

How rate constant (K) changes depending on temperature and activation energy

Question 2

for the Arrhenius equation, as Ea gets BIGGER, k gets….

Answer 2

k gets smaller
- so the rate will be slower

• This is because if the reaction has a higher activation energy, this means not many reactant particles will have enough energy to react

Question 3

for the Arrhenius equation, as temparture increases, K ….

Answer 3

K increases

• as the at higher temperatures particles have more energy and move faster and collide more frequently and successfully.
• so rate increases

Question 4

take a natural log from Arrhenius equation gives….

Answer 4

lnK=lnA - Ea/RT

unit for temperature is Kelvin.

Question 5

what do u plot against when plotting an arrhenius plot

Answer 5

plot lnK ( y axis) against 1/T ( x axis)

Question 6

what is the expression for gradient of the line of best fit

Answer 6

1) -Ea/R

- then once you know the actual gradient, you can calculate activation energy and Arrhenius constant.