Types of chemical reactions

Question 1

Combustion:

Answer 1

When a fuel burns in the presence of oxygen.

Question 2

Thermal decomposition

Answer 2

When a compound breaks down forming two or more products.

Question 3

Oxidation

Answer 3

When a substance gains oxygen
(zinc- zinc oxide).
Substance + oxygen → Substance oxide.

Question 4

Exothermic reactions

Answer 4

REALEASE energy into the atmosphere (normally in the form of heat).

Question 5

Endothermic reactions

Answer 5

A chemical reaction that ABSORBS energy from its surroundings.

Question 6

Conservation of mass:

Answer 6

This is a rule which tells us that during a chemical reaction no atoms are destroyed or created. This means that the reactants and products are going to have the same mass.

Question 7

Change of state:

Answer 7

The process of turning from a solid, liquid, or gas into another one of those states

Question 8

A chemical reaction is..

Answer 8

The process in which one or more substances, the reactants, are converted to one or more different substances, the products.