WorksheetsCollision Theory
Total questions: 32
Worksheet time: 40mins
List four factors that affects the rate of a reaction
temperature
concentration
surface area
volume
catalysts
A temperature increase causes the particles ......
to slow down
move faster
collide higher
in the right order
Why does a higher concentration increase the rate of reaction?
it increases the amount of reactants
it lowers the activation energy
it increases the energy of particle collisions
it increases the frequency of particle collisions
Why does a higher temperature increase the rate of a reaction?
it increases both the frequency and energy of particle collisions
it only increases the frequency of particle collisions
it only increases the energy of particle collisions
it reduces the activation energy of the reaction
List four factors that affects the rate of a reaction
temperature
concentration
surface area
volume
catalysts
Na2S2O3(aq) + 2HCl(aq) → 2S(s) + SO2(g) + 2NaCl(aq) + H2O(l)
In a second experiment, an extral 50 mL of water is added to the hydrochloric acid. As a result of this change, the
Na2S2O3(aq) + 2HCl(aq) → 2S(s) + SO2(g) + 2NaCl(aq) + H2O(l)
Which list below contains only changes that will decrease the rate of this reaction?
Increasing the temperature of a chemical reaction
lowers the activation energy of the reaction
increases the energy of the reactant particles only
increases the energy of the reactant and product particles
Which of the following changes that can be made to a chemical reaction will result in a greater frequency of effective collisions between reactant particles?
I. increasing the temperature
II. grinding reactant lumps into a powder
III. increasing the concentration of reactants
I only
II and III only
I and II only
I, II and III
i. the molecules not colliding with sufficient energy
ii. the concentration of reactants being low
iii. the reaction reaching equilibrium
iv. the reactants not colliding in the correct orientation
i. the molecules not colliding with sufficient energy
ii. the concentration of reactants being low
iii. the reaction reaching equilibrium
iv. the reactants not colliding in the correct orientation
Objects hitting each other
Collision
Catalyst
Explosion
Reaction
Icing sugar has a greater ______ _____ than a solid cube of
sugar.
Surface Area
Catalyst
Temperature
How can you increase the rate of a reaction?
Decrease the pressure
Decrease the concentration
Increase the concentration
Which of the following increase the reaction rate?
less surface area
lower temperature
increased concentration
Which factors increase the rate of a reaction?
increasing temperature
increasing concentration
increasing surface area
all of these
Which factors affect the rate of a reaction?
temperature
concentration
surface area
pressure
Why does a higher temperature increase the rate of a reaction?
it increases both the frequency and energy of particle collisions
it only increases the frequency of particle collisions
it only increases the energy of particle collisions
it reduces the activation energy of the reaction
Why does a higher concentration increase the rate of reaction?
it increases the amount of reactants
it lowers the activation energy
it increases the energy of particle collisions
it increases the frequency of particle collisions
Grinding a effervescent tablet into powder increases the rate of reaction due to increased
concentration
surface area
temperature
reactants
Which factors increase the rate of a reaction?
increasing temperature
increasing concentration
increasing surface area
All of these
Increasing pressure means that particles are ___________ together.
Happy
Never
Paired
Closer
Increasing the temperature gives particles more __________.
Time
Energy
Space
Frequency
As the frequency of ______________ increases, the rate of reaction increases.
Time
Reactions
Collisions
Reactants
