ASSESSMENT 3 Flashcards
Crude oil and natural gas contains mainly
hydrocarbons
hydrocarbons contain
hydrogen and carbon only
fractional distillation separates hydrocarbons based on them having different
boiling points
The relationship between hydrocarbon size and boiling point is
The bigger the molecule the higher the boiling point
A fraction is
A small group of hydrocarbons with boiling points within a similar range
The list of fractions, in order of increasing boiling point is
natural gas, petrol, naphtha, kerosene, diesel, fuel oil, residue/bitumen
A use for each fraction in order of increasing boiling point is
fuel for cooking, fuel for cars, chemicals for medicines and plastics, fuel for planes, fuel for trucks, fuel for ships/lubrication, tarmac
Other properties which relate to molecular size include
flammability and viscosity
When fossil fuels burn the products can cause
global warming and acid rain
Carbon monoxide is produced when
there is a lack of oxygen
The name given to making carbon monoxide is
incomplete combustion
the problem with carbon monoxide is that it is
toxic
sulfur dioxide and nitrogen oxides can cause
acid rain
acid rain affects
rivers/lakes, buildings and plants/trees.
Harmful gases can be converted into less harmful gases using
a catalytic converter
the equation to show photosynthesis is
carbon dioxide+ water–>glucose+oxygen
carbohydrates are important in our diet because
they provide energy
when carbohydrates burn they produce
CO2 + H20 [+ energy]
carbohydrates contain the elements
carbon, hydrogen and oxygen
Alcohol is made from
sugar
Yeast is used because it contains
an enzyme which speeds up the reaction
fermentation can be shown using the equation
glucose –> ethanol + carbon dioxide
distillation is used in the drinks industry to
increase the alcohol concentration
