Crude Oil, Hydrocarbons & Alkanes (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards

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Crude Oil, Hydrocarbons & Alkanes
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Hydrocarbons definition

Compounds with only hydrogen and carbon atoms

Saturation types in hydrocarbons

Saturated or unsaturated

Homologous series definition

Family of hydrocarbons with similar properties & same formula

Homologous series physical properties trend

Show gradual variation (e.g., boiling points)

Effect of more carbon atoms on boiling point

Boiling point increases

Crude oil definition

Mixture of different hydrocarbons

How crude oil formed

From dead plants & animals over millions of years

Conditions for crude oil formation

High heat and pressure

Type of resource crude oil is

Finite (limited) resource

Alkanes definition

Homologous series of saturated hydrocarbons

What saturated means for alkanes

Maximum H atoms, only single bonds between C atoms

General formula for alkanes

CnH2n+2C_nH_{2n+2}

What 'n' represents in alkane formula

Number of carbon atoms

Alkanes chemical reactions

Burn in combustion, react with halogens, cracking

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