4 Crude Oil and Fuels

Question 1

Larger the hydrocarbon molecule, higher the …………
This means the the large molecule hydrocarbons are collected at the……….. of the fractional distillation column.
Because they’re are…………temperatures at the bottom of the column.

Answer 1

Boiling point
Bottom
Higher

Question 2

What sort of viscosity’s do small and large molecule hydrocarbons have?

Answer 2

Small molecule - low viscosity (very runny)

Large - high viscosity (thick)

Question 3

Describe the flammability of small and large molecules of hydrocarbon.

Answer 3

Small - very flammable

Large - less flammable

Question 4

How easy is it to turn a small molecule hydrocarbon into a gas than a large molecule?

Answer 4

Easier to turn small molecule into gas rather than large molecule.

Question 5

What allows complete combustion?

Answer 5

Large supply of air (oxygen).

Question 6

What causes incomplete combustion to occur?

Answer 6

Limited supply of air (oxygen).

Question 7

What is a fraction?

Answer 7

Groups of hydrocarbons which have similar boiling points.