Combustion of hydrocarbons

When hydrocarbons are heated in air they react with oxygen forming carbon dioxide or carbon monoxide or carbon, and water.The production of carbon dioxide and water is known as a complete combustion.The production of carbon monoxide and water or carbon and water are known as incomplete combustions.These reactions can be written as balanced chemical equations.

Write the 3 different balanced equations for the complete and incomplete combustions of butane.

C4H10

Complete Combustion

+ O2 CO2 + H2O4 513

2Incomplete Combustion

C4H10 + O2 CO + H2O4 5 9

2C4H10 + O2 C + H2O4 5 5

2

When do incomplete combustions occur?When there is not enough oxygen to fuel the complete combustion.

C4H10

Complete Combustion

+ O2 CO2 + H2O4 513

2Incomplete Combustion

C4H10 + O2 CO + H2O4 5 9

2C4H10 + O2 C + H2O4 5` 5

2

Write the 3 different balanced equations for the complete and incomplete combustions of propane.

C3H8

Complete Combustion

+ O2 CO2 + H2O3 45

Incomplete Combustion

C3H8 + O2 CO + H2O3 4 7

2C3H8 + O2 C + H2O3 4 2

When do incomplete combustions occur?When there is insufficient oxygen.

C3H8

Complete Combustion

+ O2 CO2 + H2O3 45

Incomplete Combustion

C3H8 + O2 CO + H2O3 4 7

2C3H8 + O2 C + H2O3 4 2

Making Ethyne Using Calcium carbide

When calcium carbide is added to water it produces acetylene gas (also known as Ethyne).

C C2-

C22- carbide ion

C C H OH

Making Ethyne Using Calcium carbide

When calcium carbide is added to water it produces acetylene gas (also known as Ethyne).

C C2-

C22- carbide ion

C C H OH

Making Ethyne Using Calcium carbide

When calcium carbide is added to water it produces acetylene gas (also known as Ethyne).

C C2-

C22- carbide ion

C C H OH

Making Ethyne Using Calcium carbide

When calcium carbide is added to water it produces acetylene gas (also known as Ethyne).

C C2-

C22- carbide ion

C C H OH

Making Ethyne Using Calcium carbide

When calcium carbide is added to water it produces acetylene gas (also known as Ethyne).

C C2-

C22- carbide ion

C C H OH

HOH

Making Ethyne Using Calcium carbide

When calcium carbide is added to water it produces acetylene gas (also known as Ethyne).

C C2-

C22- carbide ion

C C H OH

HOH

Making Ethyne Using Calcium carbide

When calcium carbide is added to water it produces acetylene gas (also known as Ethyne).

C C2-

C22- carbide ion

C C H OH

HOH

Making Ethyne Using Calcium carbide

When calcium carbide is added to water it produces acetylene gas (also known as Ethyne).

C C2-

C22- carbide ion

C C H OH

HOH

Making Ethyne Using Calcium carbide

When calcium carbide is added to water it produces acetylene gas (also known as Ethyne).

C C2-

C22- carbide ion

C C H OH

HOH

1- 1-

ethyne

Making Ethyne Using Calcium carbideThe balanced chemical equation is:

C C H OH

HOH

1- 1-

ethyne

CaC2 + H2O -----> C2H2 + Ca(OH)22

The net ionic equation is:

C22- + H2O -----> C2H2 + OH1-22