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Alcohol is the name given to a group of molecules called hydrocarbons. The alcohol present in drinks is ethanol. These hydrocarbons contain many chemical bonds and in turn a large energy potential. When the the alcohol is lit by a another source of energy (lighter) the bonds break rapidly releasing energy in the form of heat. Fossil fuels such as petroleum and coal contain hydrocarbons. As a point of interest internal combustion engines do not efficiently harvest the energy contained in fossil fuels and hence pollute the atmosphere. In a similar comparison our bodies extract energy from similar bonds such as carbohydrates (sugars) and lipids (fats).

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8y ago
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7mo ago

Alcohol is flammable because it has a low flash point, which is the temperature at which it vaporizes and can ignite in the presence of an ignition source like a flame. The chemical structure of alcohol contains carbon and hydrogen atoms which can easily react with oxygen in the air to produce heat and light when ignited.

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12y ago

because, upon burning, alcohols are converted to CO2 and H2O

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Q: Why is alcohol flammable?
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