rate equations

Question 1

zero order ?

Answer 1

changing [ reactant ] has no effect on the rate

Question 2

1st order

Answer 2

change in [ reactant ] directly proportional to change in rate

Question 3

2nd order

Answer 3

change in rate is proportional to change in [ reactant ] ^2

Question 4

what is the area under the curve in a Maxwell Boltzmann distribution curve ?

Answer 4

total number of particles

Question 5

if the rate equation is : rate = k[Y]^2
what’s the orders ?

Answer 5

2nd order w respect to Y

Question 6

what is a key point that needs to happen In experiments about order

Answer 6

total volume must be constant

Question 7

how to carry out an iodine clock initial rates practical ?

Answer 7

-measure known volume of reactants
-combine H2O2 , H2SO4 (H+) , starch, thiosulphate
-keep KI separate, to stop reaction from starting until ready
-mix the 2 beakers and start the timer
-stop timer when blue black colour appears
-repeat w different vol of KI - add water to keep total volume same
-calc rate = 1/ time

Question 8

Arrhenius equation rearranged for Ea

Answer 8

Ea = RT(Lnk - LnA)

Question 9

the gradient on an Arrhenius graph is what ?

Answer 9

the gradient is -Ea/R
(so u would x 8.31 then divide by 1000) to get Ea

Question 10

what is meant by the term order of a reaction with respect to a ?

Answer 10

the power to which a species conc is raised in the reaction