Fuels and Crude Oil - 15
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1
What are fossil fuels?
They are coal, crude oil and natural gas which are non-renewable sources of energy
2
What is crude oil formed of?
Hydrocarbons which have different boiling points and are miscible, hence separated by fractional distillation
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8
What are biofuels?
They are an alternative renewable energy source to crude oil and natural gas. Plants or animals used in their production can be regrown and replaced in a short period of time compared to fossil fuels.
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Why is the burning of ethanol more environmentally sustainable than the use of fossil fuels?
As sugarcane grows, it absorbs carbon dioxide during photosynthesis, which offsets the carbon dioxide produced when bioethanol is burnt