9. kinetics I (as)

Question 1

particles must …. to react

Answer 1

collide

Question 2

collision theory

Answer 2

• collide in the right direction ( need to be facing each other the right way)
• they collide with at least a certain minimum amount of kinetic energy

Question 3

activation energy def

Answer 3

the minimum amount of kinetic energy particles need to react

Question 4

Maxwell-boltzmann distribution

Answer 4

plot a graph of number of molecules in a substance with different kinetic energies

Question 5

things that affect reaction rate

Answer 5

• concentration
• pressure
• temperature
  catalysts

Question 6

increasing conc causes

Answer 6

sped up reactions
more particles in a volume particles collide more frequently ,, more chance to react

Question 7

increasing pressure (gas) causes

Answer 7

reaction to be sped up
more particles in a given volume ,, increase frequency of successful collisions

Question 8

catalysts cause

Answer 8

sped up reactions
lower activation energy by providing an alternate pathway for bonds to be broken and remade
more particles have enough energy to react

Question 9

reaction rate def

Answer 9

how fast reactants are converted to products

Question 10

rate of reaction calculation

Answer 10

amount of reactants used or products formed/ time taken

Question 11

catalysts

Answer 11

increase rate of reaction by providing an alternate pathway with a lower activation energy so greater proportion of collisions result in a reaction
catalyst chemically unchanged at the end of reaction

Question 12

heterogenous catalysis