3.2.2 reaction rates

Question 1

how does concentration and pressure affect collision rate

Answer 1

more particles per cm^3
which increases the frequency of successfull collsions

Question 2

what is the role of catalalysts

Answer 2

speed up the rate of reaction without being used up
it provides an alternative reaction pathway with lower activation energy

Question 3

what is a homogenous catalyst

Answer 3

catalysts is in the same state as the reactants

Question 4

what is heterogenous equilibria

Answer 4

catalysts is in a different state to the reactants

Question 5

what are benefits to using a catalyst

Answer 5

alows a lower temperature to be used
this reduces energy demand and less fossil fules are burnt
less co2 released

Question 6

what are the disadvantages to using a catalyst

Answer 6

many catalyst can be toxic

Question 7

explaining Bolzmann distribution curve

Answer 7

increase in proportion of molecules with energy above Ea

Question 8

show the 2 measurements for measuring the rates of reactions

Answer 8

method 1
conical flask
upturned measuring cylinder
bung
-measure volume of gas given off every 30s
method 2
-conical flask
bung
gas syringe

Question 9

what goes on the X and Y axis of a boltzman distribution curve

Answer 9

X-number of molecules
Y-energy