A
compound that changes the rate of a chemical reaction
without participating in the reaction.
Catalysts usually speed a reaction
up or allow it to take place at a lower temperature.
They are extremely important in chemical and petrochemical processes and in
environmental applications,
such as cleaning up the exhaust from a car.
A
substance that increases the rate of a chemical reaction
by reducing the activation energy, but which is left
unchanged by the reaction.
A catalyst works by
providing a convenient surface for the reaction
to occur. The reacting particles gather on the catalyst surface and either
collide more frequently with each other or more of the collisions result in a
reaction
between particles because the catalyst can lower the activation energy for the reaction.
A
subtance that increases the rate of a chemical reaction
by reducing the activation energy, but which is left
unchanged by the reaction.
A catalyst works by
providing a convenient surface for the reaction
to occur. The reacting particles gather on the catalyst surface and 1)
collide more frequently with each other, 2) more of the collisions result in
a reaction
between particles because the catalyst can lower the activation energy for the reaction.
Increases
the rate of a chemical reaction
and therefore reduces the amount of energy
used in the reaction.
The catalyst itself does not under go a chemical change
A
substance that increases the rate of a chemical reaction
by reducing the activation energy, but which is left
unchanged by the reaction.
A catalyst works by
providing a convenient surface for the reaction
to occur. The reacting particles gather on the catalyst surface and either
collide more frequently with each other or more of the collisions result in a
reaction
between particles because the catalyst can lower the activation energy for the reaction.
