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MODULE 7 - ORGANIC CHEMISTRY QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED LATEST UPDATE.Buy Quality Materials What is crude oil? a non-renewable mixture of compounds made from dead sea creatures How is crude oil formed? Dead sea creatures and plankton are covered with sediment and silt. Over ...

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  • November 15, 2024
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MODULE 7 - ORGANIC CHEMISTRY QUESTIONS WITH
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What is crude oil?
a non-renewable mixture of compounds made from dead sea creatures
How is crude oil formed?
Dead sea creatures and plankton are covered with sediment and silt. Over millions of
years, intense heat and pressure cause the creatures to form crude oil
Properties of long chain hydrocarbons
high boiling point, viscous, less flammable
Properties of short chain hydrocarbons
low boiling point, thin (flows), highly flammable
What is a hydrocarbon?
a compound made of hydrogen and carbon atoms
What is the rule for an alkane formula?
CnH2n+2
Why are alkanes saturated?
They contain only single bonds
What is the formula for methane?
CH4
What is the formula for ethane?
C2H6
What are the first 4 alkanes
methane, ethane, propane, butane
What is fractional distillation?
Crude oil is heated until it evaporates the vapour is put into a fractionating column at the
bottom and rises upwards. The temperature is highest at the bottom of the column.
Long-chain hydrocarbons condense at the bottom and are collected as liquids.
Short-chain hydrocarbons have lower boiling points. They pass up the column and
condense at lower temperatures nearer the top.
what atoms do all organic molecules contain?
Carbon
complete combustion of alkanes
alkane + oxygen - carbon dioxide + water
incomplete combustion of alkanes
alkane + oxygen - carbon / carbon monoxide + water
What is cracking?
Splitting long chain alkanes into a short chain alkane and alkene
How are long chain hydrocarbons cracked? (steam)
Hydrocarbons are mixed with steam in a very high temperature environment
How are long chain hydrocarbons cracked? (catalyst)
Vapourised hydrocarbons are passed over a hot catalyst
What type of chemical reactions are involved in cracking?

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