Diesel oil is a mixture of hydrocarbons that can be obtained from crude oil - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2021 - Paper 1
Question 2
Diesel oil is a mixture of hydrocarbons that can be obtained from crude oil.
(a) State the name of the process used to separate diesel oil from crude oil.
(b) Dies... show full transcript
Worked Solution & Example Answer:Diesel oil is a mixture of hydrocarbons that can be obtained from crude oil - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2021 - Paper 1
Step 1
State the name of the process used to separate diesel oil from crude oil.
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Answer
The process used to separate diesel oil from crude oil is called fractional distillation.
Step 2
Which statement about compounds in this homologous series is true?
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Answer
The correct statement is C: they have the same general formula. Alkanes in the homologous series are characterized by having a consistent general formula, which can be represented as CₙH₂ₙ₊₂.
Step 3
Complete the balanced equation for the reaction.
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Answer
The balanced equation for the reaction is:
ightarrow 2NO_2$$
Step 4
Explain how the greenhouse effect is caused by the gases produced by the complete combustion of diesel oil.
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Answer
The greenhouse effect is caused by gases such as carbon dioxide (CO₂) and water vapor (H₂O) that are produced during the complete combustion of diesel oil.
When diesel oil burns, it reacts with oxygen to produce carbon dioxide and water:
ightarrow CO_2 + H_2O$$
These gases accumulate in the atmosphere, trapping heat from the sun and preventing it from escaping back into space. This leads to an increase in the Earth's temperature, contributing to climate change.
