What is the product of fossil fuel and oxygen?

Answer 1

The fuel reacts with the oxygen to produce carbon dioxide and water, which appears as steam and is usually invisible. The reaction also produces heat, from the formation of carbon-oxygen bonds and hydrogen-oxygen bonds.

A typical reaction is octane, for which 1 kg of fuel reacts with 3.51 kg of oxygen to produce 3.09 kg of carbon dioxide and 1.42 kg of water.

Answer 2

Simply putting oxygen and fossil fuels together will not result in a reaction (this is why spilling gasoline at the pump does not result in some spontaneous change). You need heat or fire to have a reaction. If you add the heat or fire, the resulting products will be water, carbon dioxide, and a small explosion.

Answer 3

Burning any of the fossil fuels in air (which contains oxygen) gives you carbon dioxide and water.