crude oil 4.0 / 5 based on 1 rating ? ChemistryCrude oil, cracking and hydrocarbonsGCSEAQA Created by: ninaCreated on: 17-04-13 21:36 what are hydrocarbons made of? hydrogen and carbons atoms joined by covalent bonds 1 of 19 what is the formula for alkanes? CnH2n+2 2 of 19 are alkanes saturated or unsaturated? saturated (joined by single bonds) 3 of 19 what is distillation? process used to separate pure liquid from a mixture of liquids 4 of 19 what is fractional distillation? separates a mixture into fractions (different parts) 5 of 19 what happens at the top (cool part) of a fractionating column? the substances with the highest boiling points (which will be gases) condense 6 of 19 what happens at the bottom (hot part) of a fractionating column? the substances with the lowest boiling points (which will be solids) condense 7 of 19 as you go up the fractionating column, hydrocarbons have... lower viscosity and higher flammability 8 of 19 what is complete combustion? when fuels react with oxygen in plenty of air and so burn 9 of 19 what does hydrogen become when it is oxidised? H20 10 of 19 when does incomplete/partial combustion happen? when there is insufficient air 11 of 19 during partial combustion what does carbon form? carbon monoxide 12 of 19 what do particulates contain and what do they cause? contain carbon and cause global dimming 13 of 19 what is the main rock that acid rain reacts with? limestone 14 of 19 when sulphur dioxide reacts with powdered limestone what does it form? calcium sulfate 15 of 19 what are bio fuels made from? plant material 16 of 19 what are some examples of biofuels? biodiesel and bioethanol 17 of 19 what are some advantages of biofuels? increased income for farmers, lower fuel prices, carbon neutral 18 of 19 what are some disadvantages of biofuels? space is taken which could be used for food, fertilisers used which use fossil fuels 19 of 19
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