17 questions
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
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
Objects hitting each other
Collision
Catalyst
Explosion
Reaction
Icing sugar has a greater ______ _____ than a solid cube of
sugar.
Surface Area
Catalyst
Temperature