Fossil Fuels• List 5 fossil fuels • What are products of combustion ? • What other gases can be made ?
Comparing FuelsTake 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
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
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 polymerisationor condensation polymerisation.