Chemistry 1B
- Created by: Shine.7
- Created on: 13-04-14 15:15
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- Chemistry 1B
- CRACKING-(thermal decomposition reaction) [splitting up long-chain hydrocarbons,to smaller useful ones.]
- Heated up/mixed w/ steam/ passed over catalyst
- ALKENES + unsaturated HC produced
- Long chain HC=thick-not useful.
- Heated up/mixed w/ steam/ passed over catalyst
- ALKENES
- CnH2n
- C=C double-bond
- Liquid / decolourises in Bromine water
- Unsaturated: double bonds can open up SO more bonds can be made
- MONOMERS(small alkenes)
- join together(bonds open up)- POLYMERISATION
- form large molecules = POLYMERS
- Different properties affected by: temp/pressure/presence catalyst
- Cheap &re-usable
- Doesn't ROT/ Not Biodegradable
- Different properties affected by: temp/pressure/presence catalyst
- form large molecules = POLYMERS
- join together(bonds open up)- POLYMERISATION
- PRODUCTION OF ETHANOL
- C2H5OH
- 1) Ethene+ Steam
- Faster/ pure prdt/no waste prdt/continous process
- Lots of heat/energy needed./Non-renewable/high cost
- 2) FERMENTATION [Sugar from plants broken by enzymes- SUGAR+YEAST]
- CO2 produced/ slow reaction-longer
- cheap/less energy/renewable
- 1) Ethene+ Steam
- C2H5OH
- VEGETABLE OILS {from plants/fruit/seeds}
- For FOOD+FUEL
- Provides a lot of ENERGY
- HIGH B.P - cooks faster
- Different flavour/texture
- PRESSING [crushed/pressed between metal plates-impurities removed]
- DISTILLATION[plants in water-boiled-evaporation-oil collected from condensation]
- HARDENING/HYDROGENATION[VO turns solid-spreadable]
- Hydrogen+Nickel Catalyst 60
- HIGH M.P
- Double bond converted into single bonds
- PARTIALLY- cheaper/longer shelf life
- Trans fat- bad for health
- Hydrogen+Nickel Catalyst 60
- For FOOD+FUEL
- EARTH
- Core/mantle/crust/atmosphere (compare w/egg)
- TECTONIC PLATES-cracked pieces of the crust and mantle
- Move due to CONVECTION CURRENTS-radioactive decay
- Plate boundaries-when TC meet-hard to predict earthquakes etc
- WEGNER-all continents fitted like a jigsaw. Same pattern of rocks/same animals/no landbridges found on seabed.
- CRACKING-(thermal decomposition reaction) [splitting up long-chain hydrocarbons,to smaller useful ones.]
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