Chem rates of reaction

Question 1

Instantaneous rate of reaction

Answer 1

The rate of reaction at any one particular time during reactions

Question 1

Enzyme

Answer 1

A substance that is produced by a living cell and acts a a biological catalyst

Question 2

Rates of reaction

Answer 2

The change in concentration per unit time of any one reactant or product

Question 3

Catalyst

Answer 3

A substance that alters the rate of a chemical reaction but is not consumed in the reaction

Question 4

Homogeneous catalyst

Answer 4

A catalyst in which both the reactants and catalysts are in the same phase- no boundary between the reactants and the catalyst

Question 5

Autocatalysis

Answer 5

Catalysis in which one of the products of the reaction acts as a catalyst for the reaction

Question 6

Catalytic converter

Answer 6

A device in the exhaust system of a motor vehicle which contains catalysts to convert pollutants in the exhaust gases to less harmful substances

Question 7

Catalyst position

Answer 7

A substance that makes catalysts inactive

Question 8

Effective collision

Answer 8

One that results in the formation of products

Question 9

Activation energy

Answer 9

The minimum energy that colliding particles must have for a reaction to occur

Question 10

Reaction profile diagram

Answer 10

A graph which shows the change in energy of a chemical reaction with time as the reaction progresses