Types of Chemical Reactions

continued

SYNTHESIS REACTION

A + B = AB

Types of Reactions1. Synthesis Reaction

• Occurs when two or more reactants come together to make one large product.

Basically: A + B —> AB

Reactant + Reactant 2 —> 1 product

Example: 2Ag + O2 —> 2AgO

Combustion Reactions

What is Combustion?

What is required for combustion to take place?

What are the products?

In simplest terms, combustion is:

fuel + oxygen —> oxides + energy Note —> fuels are usually carbon based

There are two types of combustion and it depends on the abundance of oxygen.

When complete combustion occurs, there is a plentiful supply of oxygen and all the fuel is consumed.

Fuel + Oxygen —> Carbon dioxide + Water

C6H12O6 + O2 —> CO2 +H2O

If there is a poor supply of oxygen, incomplete combustion occurs. The reaction is still exothermic but does not generate as much energy.

Fuel + oxygen gas —> carbon dioxide + carbon + carbon monoxide + water + energy

C4H10 +5 O2 —> 2 CO2 (g) + 5 H2O + CO + C + energy

DECOMPOSITION REACTION

AB = A + B

Types of Reactions2 . Decomposition reaction

• when a compound is broken down into simpler products

Basically: AB —> A + B

Compound ---> product 1 + product 1

eg. 2Cu2O —> 4 Cu + O2