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What gas comes out the exhaust pipe of a car and is a result of combustion?
Wiki User
∙ 12y ago
The major gas that comes out of cars (internal combustion engines) is carbon dioxide. There are many other gases as well, such as carbon monoxide, nitrous oxides, water vapor, and unburned gasoline.
AnswerGas % of the gas in the exhaust fumes
Carbon Dioxide 9%
Carbon Monoxide 5%
Oxygen 4%
Hydrogen 2%
Hydrocarbons 0.2%
Nitrogen Oxides 0.2%
Sulfur Dioxide less than 0.003%
Lead (I think) 79.6%
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoComplete combustion from a car results in CO2 (carbon dioxide) and H2O (water) as the byproducts. However, car engines are not perfect converters of fuel into CO2 and H2O. The engine's incomplete combustion results in CO (carbon monoxide) and the other particulates and impurities in the fuel can create various (often toxic) types of byproducts that can lead to things like smog (Nitrogen plays a big part in this as car combustion often lead to the creation of NOx).
Catalytic converters are made to decrease the three main pollutants in automobile exhaust: an oxidising reaction converts carbon monoxide (CO) and unburned hydrocarbons (HC), and a reduction reaction converts oxides of nitrogen (NOx) to produce carbon dioxide (CO2), nitrogen (N2), and water (H2O).
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