1. Chemical Equations III
Combustion Reactions

2. Step to Balancing Combustion equations
You may have to make some changes but you have to start somewhere.
Balance in this order with some exceptions
Carbon
Hydrogen
oxygen

3. Equation 1 Carbon ___ C5H10O +__ O2 ----- > 5 CO2 +___ H2O Hydrogen
Oxygen (total on product side)
___ C5H10O +_7_ O >_5__ CO2 +_5_ H2O
___ C5H10O +_7_ O >_5_ CO2 +_5 H2O

4. Equation 2 ___C6H6 +__ O2 ----- >___ CO2 +___ H2O Carbon
Hydrogen
___C6H6 +__ O >__6_ CO H2O
Oxygen ( start on product side)
___C6H6 +_15/2_ O >_6__ CO2 +_3__ H2O
Don’t want /2 O2. Multiply equation by “2”
__2_C6H6 +_15_ O >_12_ CO2 +_6 H2O

5. Equation III ___CH3NH2 +__ O2 ----- >___ CO2 +___ H2O + __N2
1. Nitrogen (exception)
_2__CH3NH2 +__ O >___ CO2 +___ H2O + __N2
2. Carbon
__2_CH3NH2 +__ O >__2_ CO2 +___ H2O + __N2
3. Hydrogen
_2__CH3NH2 +__ O >__2_ CO2 + _5_ H2O + __N2
4. Oxygen
_2__CH3NH2 + _9/2_ O >_2__ CO2 + _5__ H2O + __N2
multiply equation by “2”
Answer _4__CH3NH _9_ O >_4__ CO2 +__10_ H2O + _ 2_ N2

6. Put answers in your Classwork/Homework Notebook
C4H O > CO H2O
C6H12O O > CO H2O
C5H6O + O > CO H2O
C7H6O2S + O > CO H2O
C2H5 OH + O > CO2 + H2O