7.1.2 Fractional distillation Flashcards
1
Q
What are the many hydrocarbons in crude oil separated into?
How?
A
2
Q
What can the fractions from fractional distillation be processed to produce?
A
3
Q
What fuels do we depend for our modern lifestyle?
Where are they produced from?
A
4
Q
What useful materials do we depend on for our modern life?
Who produces them?
A
5
Q
Why do the vast array of natural + synthetic carbon compounds occur?
A
6
Q
Why can crude oil be separated into fractions?
A
7
Q
Explain how fractional distillation works
A
- crude oil vaporised + fed into fractionating column (hot at bottom, cooler at top)
- vapour moves up column - getting cooler as they go up
- hydrocarbons condense to liquids when they reach the level that is their boiling point
- hydrocarbons with smallest molecules have lowest BP - gases collected at top
- fractions collected at the bottom of the column contain hydrocarbons with the highest boiling points - solids at room temperature
