Combustion of hydrocarbons

1
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.
2
Write the 3 different balanced equations for the
complete and incomplete combustions of butane.
Complete Combustion
5
C4H10

O2
CO2

H2O
4
Incomplete Combustion
H2O
5
C4H10

O2
CO

4
5
C4H10

O2
C

H2O
4
3
When do incomplete combustions occur? When there
is not enough oxygen to fuel the complete
combustion.
Complete Combustion
5
C4H10

O2
CO2

H2O
4
Incomplete Combustion
H2O
5
C4H10

O2
CO

4
5
C4H10

O2
C

H2O
4
4
Write the 3 different balanced equations for the
complete and incomplete combustions of propane.
Complete Combustion
4
C3H8

O2
CO2

H2O
3
Incomplete Combustion
H2O
4
C3H8

O2
CO

3
4
C3H8

O2
C

H2O
3
5
When do incomplete combustions occur? When there
is insufficient oxygen.
Complete Combustion
4
C3H8

O2
CO2

H2O
3
Incomplete Combustion
H2O
4
C3H8

O2
CO

3
4
C3H8

O2
C

H2O
3
6
Making Ethyne Using Calcium carbide
When calcium carbide is added to water it
produces acetylene gas (also known as Ethyne).
C22- carbide ion
7
Making Ethyne Using Calcium carbide
When calcium carbide is added to water it
produces acetylene gas (also known as Ethyne).
C22- carbide ion
8
Making Ethyne Using Calcium carbide
When calcium carbide is added to water it
produces acetylene gas (also known as Ethyne).
C22- carbide ion
9
Making Ethyne Using Calcium carbide
When calcium carbide is added to water it
produces acetylene gas (also known as Ethyne).
C22- carbide ion
10
Making Ethyne Using Calcium carbide
When calcium carbide is added to water it
produces acetylene gas (also known as Ethyne).
C22- carbide ion
11
Making Ethyne Using Calcium carbide
When calcium carbide is added to water it
produces acetylene gas (also known as Ethyne).
C22- carbide ion
12
Making Ethyne Using Calcium carbide
When calcium carbide is added to water it
produces acetylene gas (also known as Ethyne).
C22- carbide ion
13
Making Ethyne Using Calcium carbide
When calcium carbide is added to water it
produces acetylene gas (also known as Ethyne).
C22- carbide ion
14
Making Ethyne Using Calcium carbide
When calcium carbide is added to water it
produces acetylene gas (also known as Ethyne).
C22- carbide ion
1-
1-
O
O
H
H
ethyne
H
H
15
Making Ethyne Using Calcium carbide
The balanced chemical equation is
CaC2 H2O -----gt C2H2 Ca(OH)2
2
The net ionic equation is
2
C22- H2O -----gt C2H2 OH1-
2
1-
1-
O
O
H
H
ethyne
H
H
16
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