Topic 8

Question 1

what is fractional distillation

Answer 1

separating crude oil into useful fractions by their boiling points

Question 2

how does fractional distillation separate crude oil into fractions

Answer 2

-oil heated up until most of it is gas
-gasses enter fractioning column
-liquid but drained off at bottom(bitumen)

Question 3

longer hydrocarbons have

Answer 3

higher boiling points

Question 4

fractioning column
Good People Keep Darren Fed Badly

Answer 4

Gasses
Petrol
Kerosene
Diesel oil
Fuel oil
Bitumen

Question 5

Difference between short and long chain hydrocarbons

Answer 5

flammability-short chain easy to ignite bc low boiling points. normally gass
-long chain higher boling points so harder to ignite.normally liquid

viscosity=how easy substance flows
-long hydrocarbons have high vis bc there thick
-short hydrocarbons have low vis much runnier
stronger force between hydrocarbons=harder to flow

Question 6

homologous series

Answer 6

-compounds with same functional group
-similar chemical properties

Question 7

what are the products of incomplete combustion

Answer 7

-less oxygen than carbon dioxide
-h20,co2,co,c

Question 8

how does methane contribute to greenhouse effect

Answer 8

-act as balnket insulating the earth
-slowing the rate at which heat leaves the planet
-asorb and reflect thermal radiation

Question 9

gass test of oxygen

Answer 9

-put glowing splint in test tube wigh gas in
-if theres oxygen splint will relight

Question 10

gas test for hydrogen

Answer 10

-put lighted splint in gas filled testube
-if theres hydrogen there will be a squeeky pop

Question 11

gas test for carbon dioxide

Answer 11

-bubble gass through limewater
-if theres carbon dioxide limewater will turn cloudy milky colour