Predict the Products of Combustion

Fossil fuels are called hydrocarbons. This means they are molecules that are mainly composed of hydrogen and carbon atoms. If we cause these fuels to react with oxygen, that reaction gives off products.

Using what we know about the atoms in hydrocarbons, like fossil fuels, and oxygen, make predictions about what gases could be products of combustion. You will use the information below about common gases in the atmosphere to help you make your predictions.

1. Look at the chemical equation on the right. Based on what atoms are reacting (C, H, and O) predict what elements will be in the product(s) of this chemical reaction.

2. Look at the left column, which shows the common gases in the atmosphere. Which ones can you rule out as potential products because they are made of the wrong atoms?

3. Now, examine the rest of the information in the table above. Think about these questions:

   1. What would happen if we brought each gas near a flame?

   2. Would it react and be more like a reactant? Or would it not react and potentially be a product?

4. Keep a list of gases in the atmosphere that are possible products of combustion because they (1) are composed of the right kinds of atoms, and (2) would not be flammable or combustible.

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