Nat 5 - Energy from fuels

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What is an exothermic reaction?

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A reaction or process that releases heat energy.

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What is an endothermic reaction?

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A reaction or process that takes in heat energy.

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What happens during combustion?

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A substance reacts with oxygen releasing energy. Complete combustion is where a fuel burns completely in oxygen to produce carbon dioxide and water.

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What do hydrocarbons and alcohols produce when they burn in oxygen?

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They produce carbon dioxide and water.

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Exothermic

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