Organic Alkanes Flashcards
Define petroleum fraction
Mixture of hydrocarbons with similar chain length and boiling point range
What happens to oil before fractional distillation happens?
It is preheated
What happens after the oil has been preheated?
It is passed into the column
How do different fractions condense?
Fractions condense at different heights
What happens to the temperature as it goes up?
Temperature of column decreases upwards
What does boiling point depend on?
Boiling point depends upon size of molecule
How does size of molecule affect the van der waals forces between them?
The larger the molecule the larger the van der waal forces
Where do small molecules condense?
Small molecules condense at lower temperatures
Where do larger molecules condense?
Larger molecules condense at higher temperatures
Where do similar molecules condense?
Similar molecules condense together
What does separation depend upon?
Separation depends on boiling points
What physical process involving splitting weak van der waals?
Fractional distillation
What is petroleum made of?
A mixture of alkane hydrocarbons
Pollutants?
Nitrogen oxide Carbon monoxide Carbon dioxide Unburnt hydrocarbons Soot
Nitrogen oxide 😡?
Toxic
Can form NO2
NO2 is toxic and can fall as acid rain
