Properties of Hydrocarbons (AQA GCSE Chemistry Combined Science): Flashcards

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Properties of Hydrocarbons
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Elements in hydrocarbons

Only hydrogen and carbon atoms

Boiling point of long-chain hydrocarbons

Higher (strong intermolecular forces)

Boiling point of short-chain hydrocarbons

Lower (weak intermolecular forces)

Boiling point of ethane (C2H6C_2H_6)

-89°C

Boiling point of heptane (C7H16C_7H_{16})

98°C

Viscosity definition

Liquid's resistance to flow or thickness

Viscosity of larger hydrocarbons

Higher (thicker, flow less easily)

Flammability definition

How easily a hydrocarbon can combust

Flammability of smaller hydrocarbons

More flammable (effective fuels)

Flammability of larger hydrocarbons

Less flammable

Intermolecular forces in long-chain HCs

Strong

Intermolecular forces in short-chain HCs

Weak

Long-chain HCs in fractionating column

Condense near bottom

Short-chain HCs in fractionating column

Condense near top

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Hydrocarbons: Fuel & Feedstock

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Hydrocarbons: Fuel & Feedstock

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