Crude oil is a mixture of hydrocarbons - Edexcel - GCSE Chemistry - Question 5 - 2013 - Paper 1
Question 5
Crude oil is a mixture of hydrocarbons.
(a) The diagram shows a molecule of each of three substances, A, B and C.
Substance B is a hydrocarbon.
Substances A and C... show full transcript
Worked Solution & Example Answer:Crude oil is a mixture of hydrocarbons - Edexcel - GCSE Chemistry - Question 5 - 2013 - Paper 1
Step 1
Explain why substance B is a hydrocarbon.
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Answer
Substance B is classified as a hydrocarbon because it contains both carbon (C) and hydrogen (H) atoms. This characteristic is essential for hydrocarbons, as they are defined solely by the presence of these two types of elements.
Step 2
Complete the sentence by putting a cross (✗) in the box next to your answer.
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Answer
The correct option is D: 'burns to produce heat energy.' This indicates that octane is a useful fuel, as its combustion process generates heat energy.
Step 3
Write the word equation for this reaction.
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Answer
The word equation for the complete combustion of octane is:
