Definitions: Rates Of Reactions Flashcards
1
Q
Activation energy
A
The minimum amount of energy that colliding molecules must possess in order to react
2
Q
Catalyst
A
A substance which alters the rate of a chemical reaction but is not used up during the reaction and remains chemically unchanged at the end of the reaction
3
Q
Enzyme
A
A biological catalyst e.g: amylase
4
Q
Heterogeneous catalysis
A
A system in which the catalyst and the reactants are in different phases
5
Q
Homogeneous catalysis
A
A systems in which both the catalyst and the reactants are in the same phase
6
Q
Catalyst poison
A
A substance which destroys the activity of a catalyst
7
Q
Catalytic converter
A
It changes poisonous molecules like carbon monoxide and nitrogen monoxide in car exhausts into less harmful molecules such as carbon dioxide and nitrogen and oxygen
