Advantages and disadvantages of the 2 methods for preparing alcohol.

Methods	Advantages	Disadvantages
Fermentation	·         Renewable raw materials ·         Warm, normal pressure needed ·         Only little amounts of energy is needed to Ferment	·         Made in Batches meaning that your will have to stop and start ·         A lot of workers needed ·         A very slow process ·         Impure- needs treatment
Industrially	·         Very Fast ·         It is also a continuous process	·         Uses non-renewable sources

3.8 Describe the addition reaction of alkenes with bromine,including the decolourising of bromine water as a test for alkenes

1.       Write the word equation showing the reaction between ethene and bromine water

2.       Draw the displayed formula of the reaction above

3.       Explain the observations

4.       Why does this reaction not need a catalyst?

5.       What type of reaction is this called?

6.       Explain why this reaction is useful

3.5 I can recall the reaction of methane and bromine

Alkanes react with bromine in the presence of UV Light

Explain why this condition is necessary UV provides the energy needed to break the Covalent bonds 

What is this type of reaction called Substitution 

State and explain the observations It will go from brown to colorless 

Draw the displayed formula of the reaction between methane and bromine (upload a photo)

Write out a balanced (with state symbols) the reaction between ethane and chlorine
C2H6 (g) + Cl2 (g) --> C2H5cl (g) + HCl (g)

State and explain the observations in this chemical reaction
It turns from a yellow gas into a colorless one 

3.4 I can recall the products of complete and incomplete combustion of alkenes

1.       Saturated hydrocarbons are called Alkanes 

2.       Small chain Alkanes are used as fuels

3.       The reaction is called Combustion 

4.       The word equation for  this chemical reaction is :

fuel (Hydrocarbon) + Oxygen → Carbon Dioxide + Water + ENERGY (heat, light, sound)

5.       If there is insufficient oxygen then the word equation is:

fuel (Hydrocarbon) + Oxygen → Carbon monoxide + Water + ENERGY (heat, light, sound)

6.       The problem with this reaction is that Carbon monoxide is produced this gas is a Poison to the human body (see objective 5.11)

7.       Where can you find incomplete combustion? In your Car

8.       What is used to reduce the harmful products from incomplete combustion? A Catalytic Converter

9.       During incomplete combustion a smoky flame is often seen, explain this observation This is unburnt carbon 

Extn: write a balanced equation (with state symbols) for the combustion of propane gas

C₃H_8(g)+5O_2(g)→3CO_2(g)+4H₂O_(l)

3.2 and 3.3 i can recall the general formula and displayed formula of Alkanes

3. What is the General Formula for Alkanes?
Cn H2n+2
4. Describe and explain the trend in boiling points
The boiling point increases as you go up the Alkane group this is because the further you go into the group there are more bonds that need to be broken
5. three isomers of pentane 

3.1 I can explain the terms homologous series, hydrocarbon, saturated, unsaturated, general formula and isomerism

Term	Definition	Example
Homologous series	A family of Hydrocarbons with a similar general formula	Alkane
Hydrocarbon	A compound of only Hydrogen and Carbon	Crude Oil
Saturated hydrocarbon	Contains only single bonds	Methane
Unsaturated hydrocarbon	Has a Carbon double bond	Methene
General formula	The mathematical formula in which connects the amount of Hydrogen and carbons	Cn H2n+2
Isomerism	Same Chemical Properties but different Physical properties