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HSC Chemistry topic 1 "Production of Materials" keep it simple science pg - 62  Fermentation of sugar to Ethanol. 

advantages and disadvantages of fuel and use of ethanol

Advantages of the potential use of Ethanol Alternative fuel

• Ethanol is a renewable fuel, when derived from plant material
• descends the use and conserves petroleum, which is non-renewable and estimated to run out in about 3 decades.
• Greenhouse friendly
• combustion is clean and pure than other fuels.

Disadvantages of the potential use of Ethanol Alternative fuel

• to replace petrol with ethanol, you will have to remove a lot of land and make those lands as farms of crops.
• the energy required to distill petrol to ethanol is a lot. fossil fuels are used for this.
• the car manufacture engineers will have to design a new motor to run ethanol and will cost a lot of money for make.

 Assessment of Alternative fuel based on advantages and disadvantages

There is 10% of ethanol in petrol ( E10 ). But yet is not reducing greenhouse emissions.

• Newer energy sources that are renewable that operate distillation. 

if they continue soon in the future to operate such technolgy from protecting our ozone layer, it will be a big success in human history and society.

Why ethanol is a renewable resource

Ethanol molecule is made up of CH 3-CH 2-OH. the OH compound creates a polar covalent bond causing the dipole-dipole forces to activate as well there is a hydrogen bond that is very strong between the molecules. OH lets the ethanol to become solvent for the polar substances. Although the dispersion forces between CH bonds donate to dissolve non-polar substances.

Here we have ethanol combustion reaction:

 IGNORE first equation of methanol!

When oxygen is present in a reaction along with heat energy there is a reaction called combustion. As Oxygen is present in the ethanol reaction this allows the ethanol to burn cleanly. clean fuel contain more pure and harmless substances like, Carbon Monoxide. Ethanol is easily combustible and transportable for for fuel. Cars are the main type of transport that utilities petrol. Fuel (gasoline) is environmental friendly and very clean and reliable but the gas spewing out of the exhaust pipes is toxic.

Ethanol as renewable resource

Ethanol is made from the process of Fermentation from glucose. Glucose is the sugar canes that are produced by the plants from Photosynthesis. when ethanol is combusted, Carbon Dioxide and H20 are produced. But, as well glucose can be reverted back by photosynthesis. this cycle is constantly continuing during these process