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Hydrocarbons and the importance of oil as a power source.

Extracts from this document...

Introduction

Importance of OIL BY: Shivaans Doshii Grade: 9.1 Chemistry Essay PART 1 Fossil fuels are a source of energy that comes from once-living things. When living things die, they are broken down and covered by dust, soil or sand. As they are covered over by once-living things and by more layers of soil, sand and rock, they get buried deeper and deeper below Earth's surface. These layering of once-living things, sand and soil are eventually subjected to very high pressure and to very high temperature. When the pressure is great enough, the sand and soil change into rock. And at just the right temperature, the once-living things change into liquid called oil and a gas called natural gas. This oil and gas are found in porous rocks. Crude oil is separated into fractions by fractional distillation. The fractions at the top of the fractionating column have lower boiling points than the fractions at the bottom. The heavy bottom fractions are often cracked into lighter, more useful products. All the fractions are then processed further. The fractions at the top have a lower boiling point. The fractions at the bottom have a higher boiling point Some fractions from the distillation tower need to be transformed into new components. This is where a refinery makes money, because the low-value fractions that aren't in great demand can be converted to petrol and other useful chemicals. ...read more.

Middle

> Good source of energy. Can be burnt to get energy, and you can do anything else to it to get energy. That's the reason oil is so much in demand. > Good fuel for internal combustion engines. The main reason why it is used in cars to make them move. Disadvantages > Non-renewable source of energy. This means that we are going to run out of oil after some time as it takes millions of years to form. > Causes pollution. When burnt, causes a lot of pollution. A main cause of global warming. > Carbon monoxide emissions. When burnt, it lets out carbon monoxide, which is harmful for the environment. When a ship carrying oil sinks or is damaged, it can cause a big problem. To start off with, people loose a lot of oil. This is because as ships carry a lot of oil and it sinks, so oil is lost. Then also, life in the sea is also harmed, the living things inside the water such as fish, suffer. Then a lot of money is lost as the mess has to be cleaned up. The people who had to receive oil for any purpose would not be able to complete their work on time, so that place might suffer too, as they won't have enough oil. ...read more.

Conclusion

These are the 2 activities caused by oil that are harmful for the environment. There are 2 types of energy resources, renewable and non-renewable energy. The renewable sources of energy are:- > Biomass > Geothermal > Hydropower > Solar energy > Wind energy > Tidal energy > Wave energy The non-renewable sources of energy are:- > Oil > Natural gas > Coal > Nuclear energy > Biomass I think people in the next 50 years should only concentrate on using renewable sources of energy and only use the non-renewable sources of energy as back-up in an emergency. These days we rely heavily on fossil fuels and not on energy sources like geothermal, hydropower, solar energy and wind energy which is a mistake we are making. Using renewable sources of energy would be an advantage for us as if they get over, they can be replenished in a very short period of time. We have a limited amount of non-renewable energy in the nature and it takes a lot of dead organisms and millions of years to make oil and coal. And by the time we get used to the renewable sources of energy, we will also cause less global warming as most of the renewable sources of energy do not cause any type of pollution or global warming. So using renewable sources of energy would be an advantage for us. This is a chart showing the usage of non-renewable and renewable sources of energy:- GWth stands for Growth. ...read more.

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Here's what a teacher thought of this essay

3 star(s)

This is a fairly simplistic report, and does not go into much detail. It does however give a good argument against non-renewable resources like crude oil.

Overall, this piece of work is 3 stars out of 5

Marked by teacher Brady Smith 17/06/2012

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