chem s3 u2 hydrocarbons

Question 1

what is the traditional method of making fuels

Answer 1

crushing shale rock and heating to extract oil

Question 2

what is fracking

Answer 2

extracting gas trapped by shale rock
involves drilling to the shale rock and using explosives or high pressure water to fracture rocks and extract gas and oil from shale beds

Question 3

what are problems with fracking

Answer 3

causes small earthquakes
chemicals used are hazardous to health
waste water could contaminate water supplies and hinder the development of green chemicals

Question 4

what is crude oil

Answer 4

mixture of different hydrocarbons

Question 5

what is fractional distillation

Answer 5

separates crude oil into fractions

Question 6

what does each fraction contain

Answer 6

hydrocarbon molecules of a similar size and a narrow range of boiling points

Question 7

how does the separation of crude oil into fractions occur

Answer 7

by evaporating and condensing at different ranges of temperature