Combustion of Fuels Flashcards

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What is a fuel in chemistry?

A fuel is a substance that stores energy and can burn to release that energy.

What is meant by combustion?

Combustion is a chemical reaction where a substance burns in oxygen and releases energy as heat and light.

What three things are needed for a fire to keep burning?

A fire needs fuel, oxygen and enough heat; this is called the fire triangle.

What is a hydrocarbon fuel?

A hydrocarbon fuel is a compound made only of hydrogen and carbon atoms, such as methane or petrol.

What are the main products of complete combustion of a hydrocarbon fuel?

Complete combustion of a hydrocarbon makes carbon dioxide and water.

What conditions are needed for complete combustion?

Complete combustion needs plenty of oxygen so all the carbon in the fuel turns into carbon dioxide.

What can be formed in incomplete combustion of a hydrocarbon?

Incomplete combustion can make carbon monoxide and soot (tiny carbon particles), as well as water.

Why is carbon monoxide dangerous?

Carbon monoxide is poisonous because it stops the blood carrying enough oxygen around the body.

Why is a good air supply important when burning fuels at home?

A good air supply helps the fuel burn completely, giving more energy and less carbon monoxide and soot.

How can you test for carbon dioxide from burning fuel?

You bubble the gas through limewater; if carbon dioxide is present, the limewater turns cloudy.