Flashcards
C1
Flashcards do conjunto (38)
- 1Finite resourcesNo longer being made/being made very slowly
- 2Non-renewable resourceBeing used up faster than they're being formed
- 32 problems of using fossil fuels1) It would've run out in future
2) Trying to find a replacement - 4HydrocarbonMade from molecules containing ONLY hydrogen and carbon
- 5Order of fractionating columnLPG, petrol, paraffin, diesel, heating oil, fuel oils and bitumen
- 6Where do lower boiling point hydrocarbons tap off at?The top
- 7Why can crude oil be separated?The molecules are different sizes and have different intermolecular forces
- 8Large molecules have ............ forces of attractionStrong
- 9Why do large molecules have high boiling points?Because a lot of energy is needed to break the strong forces of attraction
- 10Problems with transporting oilCan damage birds' feathers (causing death) and clean up detergents can harm wildlife
- 11Political problems with extracting crude oilUK is dependant on oil supplies from unstable countries - they can set higher prices causing problems for non-oil producing nations
- 12CrackingA process that turns larger less in demand alkanes and turns them into smaller more demanded alkenes such as petrol
- 13TEA CUPSToxicity, Energy value, Availability, Cost, Use (ease of), Pollution, Storage
- 14Fossil fuels increasing because ......populations increasing
- 15Why are governments concerned about rising population (and rise in fossil fuels)?carbon dioxide emissions increase
- 16What's put in place to cut down carbon dioxide emissions?Countries agreements within the next 15-20 years to reduce carbon dioxide emissions
- 17Methane + (sufficient amount) oxygen ->Carbon dioxide + water
- 18Positives of complete combustion- More energy released
- Carbon monoxide and soot aren't being made - 19Incomplete combustion word equationfuel + oxygen -> carbon monoxide + water
- 20Balanced symbol equation for methane + oxygenCH4 + 2O2 → CO2 + 2H2O
- 21Composition of clean air...78% nitrogen
21% oxygen
0.035% carbon dioxide - 22Why does composition of air change very little?Because there's a balance between all the processes (combustion, photosynthesis etc.)
- 23Two reasons why percentage of carbon dioxide has increased slightly-Deforestation
-Increased population - 24How did our atmosphere become how it is today?-Degassing
-Rich in water vapour and carbon dioxide
-Condensed to form oceans and carbon dioxide dissolved in water
-Nitrogen levels increased
-Photosynthesis created oxygen and took in carbon dioxide - 25Problems of sulfur dioxide-Difficulties for asthmatics
-Acid rain damaging wildlife and limestone monuments - 26Symbol equation for reaction in catalytic converter2CO + 2NO -> N2 + 2CO2
- 27AlkanesSaturated and single covalent bonds
- 28AlkenesUnsaturated and double covalent bond/s
- 29How to test for alkeneBromine turns colourless
- 30Name of bromine and ethene reactionAddition reaction
- 31what is made when you react ethene with brominea dibromo compound
- 32Conditions needed for addition polymerisationHigh pressure and a catalyst
- 33Process of addition polymerisationwhen double bond in ethene breaks and each carbon atom creates a new bond making a long molecule
- 34Properties of nylonlightweight, waterproof, UV proof
- 35benefit of Gore-Tex over nylonIts breathable
- 36What's Gore Tex made up of and why?PTFE and nylon (as its too fragile). Holes in PTFE small enough to keep rainwater out but big enough to let water vapour (sweat) out.
- 37What type of polymers are scientists trying to create?- Dissolvable
- Biodegradable - 38Environmental and economical issues with existing polymers- Landfill sites fill up quickly
- Landfill sites waste valuable space
- Burning plastics make toxic gases
- Burning/Chucking plastics increases use of crude oil
- Recycling is complicated
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- GCSE Chemistry (C1) FlashCards sobre C1, criado por Anna Hollywood em 02-10-2013.
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- Anna Hollywood
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