Rate of reaction Flashcards
(18 cards)
What is Ea?
Minimum energy required for a sucsessful collision
What factors affect rate of reaction?
temp
SA
catalysts
concentration
pressure
How does temperature affect rate?
at higher temp
partc. have more KE
more freq sucsessful collisions
How does SA affecr rate?
higher SA like powder
more area exposed for collisions to take place
more freq sucsessful collision
What is a catalyst?
provides an alternative reaction route
w/ lower Ea
catalyst remains chemically unchanged
How does concentration affect rate?
higher conc
more particles per unit vol
more F.S.C
How does pressure affect rate?
higher pressure
more particles per unit volume
more FSC
What is the total area under the curve in Boltzman distribution curve?
number of particles
Why does the BDC graph start at the origin?
no particles have 0 energy
What is dynamic equilibrium?
concentration of all substances remains constant
continuous reaction
closed system
What is le chatelier’s principle?
when a systemin dynamic equilibrium is subject to change
position of equilibrium will shift to minimise the change
What are the changes that causes the equilibrium to shift?
conc
pressure
temp
What route does an inc in temp favour?
endothermic route
What route does a dec in temp favour?
exothermic
When pressure inc what does the eq do?
shift to side with fewest moles
What are ideal conditions for the haber process?
high pressure
low temp
What are the actual conditions of the haber process?
200 atm
400-500 degrees celsius
Fe catalyst
