Definitions Flashcards
Define rate of reaction.
The rate of reaction is defined as the change in concentration per unit time of any one reactant or product
Define instantaneous reaction.
The rate of reaction at any one particular time during the reaction
What are the two equations for the rate of reaction.
Change in concentration (moles/L)/Time (secs)
1/time
Define a catalyst
A catalyst is a substance that alters the rate of a chemical reaction but is not consumed in the reaction
Define an enzyme
An enzyme is a substance that is produced by a living cell and acts as a biological catalyst
Define homogenous catalysis
Homogenous catalysis is catalysis in which both the reactants and the catalyst are in the same phase, i.e. there is no boundary between the reactants and the catalyst
Define heterogenous catalysis
Heterogenous catalysis is catalysis in which the reactants and the catalyst are in different phases, i.e. there is a boundary between the reactants and the catalyst
Define autocatalysis
Autocatalysis is catalysis in which one of the products of the reaction acts as a catalyst for the reaction
Define a catalytic converter
A catalytic converter is a device in the exhaust system of a motor vehicle which contains catalysts to convert pollutants in the exhaust gases to less harmful substances
Define a catalyst poison
A catalyst poison is a substance that makes a catalyst inactive
Define an effective collision
An effective collision is one that results in the formation of products
Define activation energy
Activation energy is the minimum energy that colliding particles must have for a reaction to occur, i.e. the minimum energy required for effective collisions between particles to occur
Define a reaction profile diagram
A reaction profile diagram is a graph which shows the change in energy of a chemical reaction with time as the reaction progresses
