G10 fuels1
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Transcript of G10 fuels1
Draw the Fire Triangle
What are Fuels ?
• http://www.youtube.com/watch?v=_KuGizBjDXo
Fuels
• What do fuels need to burn ?
• If I burn a hydrocarbon what do I make ?
• Fuel is any material that stores energy that can later ...
• If I burn an alcohol what do I make ?
Oxygen
• Uses :-
• Welding
• medicine
Fossil Fuels
• List 5 fossil fuels
• What are products of combustion ?
• What other gases can be made ?
Comparing Fuels
Take 1 candle and record the mass.
Measure 100mls of water in to a glass beaker.
Burn the candle for 2 minutes beneath the water beaker.
Record the new mass of candle.
Record the temperature rise.
Global Warming
• http://www.youtube.com/watch?v=QM-mfEMssy8
Starter
• Using the blog find the fractional distillation column – you have two minutes to remember the order of products.
Alkanes
• Saturated
• Single bonds
• CARBON ALWAYS HAS FOUR BONDS !
Alkenes
• Unsaturated
• Double Bonds
• CARBON ALWAYS HAS FOUR BONDS
Bromine Water Test
• Bromine reacts with double bonds only.
• If there are double bonds it changes from red to colourless
Friday Starter
• 5 fossil fuels
• 4 alkanes
• 3 alkenes
• 2 uses for crude oil
• 1 reason to be cheerful
Starter
14.3 Hydrocarbons
• Alkanes are generally used for energy via the process of combustion.
• The products with EXCESS Oxygen is ALWAYS
• The products with insufficient Oxygen is ALSO
• Why is this bad for life ?
Cracking
• Is the process of breaking large hydrocarbon molecules into smaller useful alkanes and alkenes. These alkenes can be chemically altered further to produce more useful chemicals, e.g. plastics.
• (Blog review)
Start
• 5 products from the fractional distillation column
• 4 uses of alkenes
• 3 names of plastics
• 2 products of incomplete combustion
• 1 reason to like Thursday
Homologous Series
• Differs by one CH2 unit
• Similar chemical properties
• Gradation of physical properties
Ethene Reacts with
• Hydrogen
• Bromine
• Steam
Alcohols
• Complete combustion
• Solvent
• Fuel
Experiment
• Which produces most energy per gram ?
• Which produces most energy per mole ?
• What is the balanced equation for the combustion of each alcohol ?
• Is it possible that combustion is incomplete ? if so what are the dangers of this ?
Starter
• Write the balanced equation for the complete combustion of ethanol.
• Write the formula for the first 3 alkenes and name them
Macromolecules
• Monomers – this is a small molecule that can bond to other monomers to make a polymer.
• There are two types of monomers – those with a double bond and those with two functional groups the same in the same molecule.
• Polymer means many monomers bonded together.
• We can have addition polymerisation or condensation polymerisation.
Addition Polymerisation
• Ethene
• Propene
• Chloroethene
Condensation Polymerisation
• 1,6-diaminohexane with Hexane-1,6-dicaboxylic acid
Nylon Rope
• Condensation polymerisation
• How to Here http://www.youtube.com/watch?v=y479OXBzCBQ
Past Paper Questions