Write correct formulas for the products in these combustion reactions.
a)C6H6 + O2=
b)C12H22O11+O2=
c)C25H52+O2=
d)C2H5OC2H5+O2=
e)C4H9OH+O2=
All hydrocarbons (and all of these are hydrocarbons) burn with O2 to form CO2 and H2O.
a) The balanced equation for the combustion of C6H6 (benzene) with O2 (oxygen) is:
2C6H6 + 15O2 -> 12CO2 + 6H2O
b) The balanced equation for the combustion of C12H22O11 (sucrose) with O2 (oxygen) is:
C12H22O11 + 12O2 -> 12CO2 + 11H2O
c) The balanced equation for the combustion of C25H52 (pentacosane) with O2 (oxygen) is:
C25H52 + 38O2 -> 25CO2 + 26H2O
d) The balanced equation for the combustion of C2H5OC2H5 (diethyl ether) with O2 (oxygen) is:
2C2H5OC2H5 + 7O2 -> 4CO2 + 6H2O
e) The balanced equation for the combustion of C4H9OH (butanol) with O2 (oxygen) is:
C4H9OH + 6O2 -> 4CO2 + 5H2O
To determine the products in combustion reactions, we need to know the reactants and the combustion products of the specific compounds.
a) C6H6 + O2:
C6H6 (also known as benzene) is a hydrocarbon. In combustion reactions, hydrocarbons react with oxygen to produce carbon dioxide (CO2) and water (H2O). Therefore, the correct formula for the products is:
C6H6 + 15/2 O2 → 6CO2 + 3H2O
b) C12H22O11 + O2:
C12H22O11 represents sucrose, which is a common sugar. Similar to hydrocarbons, sugars also undergo combustion to produce carbon dioxide and water. Hence, the correct formula for the products is:
C12H22O11 + 12O2 → 12CO2 + 11H2O
c) C25H52 + O2:
C25H52 refers to a hydrocarbon in the alkane family, called pentacosane. Alkanes burn completely in the presence of oxygen to yield carbon dioxide and water. Thus, the correct formula for the products is:
C25H52 + 38O2 → 25CO2 + 26H2O
d) C2H5OC2H5 + O2:
C2H5OC2H5 represents diethyl ether, an organic compound. When diethyl ether undergoes complete combustion, the products formed are carbon dioxide and water. Therefore, the correct formula is:
C2H5OC2H5 + 5O2 → 4CO2 + 5H2O
e) C4H9OH + O2:
C4H9OH is the chemical formula for butanol, an alcohol. Just like other hydrocarbons and alcohols, butanol combustion results in carbon dioxide and water. Hence, the correct formula is:
C4H9OH + 6O2 → 4CO2 + 5H2O