write the reactants and products when propane in combustion with oxygen and write the balanced chemical equation caLculate how many carbon dioxide molecules
Answers
Answer:
A combustion reaction is a reaction between a hydrocarbon burned in oxygen to form carbon dioxide and water.
A hydrocarbon is a molecule composed of carbon and hydrogen in this case propane. The pro- prefix tells us we have 3 carbon.
For hydrocarbons that end in the suffix -ane the formula is
C
n
H
2
n
+
2
. This means we need 8 hydrogen, making the formula
C
3
H
8
.
Now we can format the basic reaction.
C
3
H
8
+
O
2
→
C
O
2
+
H
2
O
A reminder that oxygen is a diatomic molecule as a gas,
O
2
.
Begin by balancing the hydrogen by adding a coefficient of 4 in from of the water.
C
3
H
8
+
O
2
→
C
O
2
+
4
H
2
O
This balances the hydrogen at 8. Now add a a coefficient of 3 in from of the carbon dioxide.
C
3
H
8
+
O
2
→
3
C
O
2
+
4
H
2
O
This balances the carbon at 3. We now have 10 oxygen on the on the product side, 6 from
C
O
2
and 4 from
H
2
O
. We need to add a coefficient of 5 in front of the oxygen to balance the oxygen at 10.
C
3
H
8
+
5
O
2
→
3
C
O
2
+
4
H
2
O
The combustion reaction is now balanced.