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The photograph shows a Bunsen burner - Edexcel - GCSE Chemistry - Question 5 - 2013 - Paper 1
Question 5
The photograph shows a Bunsen burner. The burner uses methane as a fuel. (a) Methane is a hydrocarbon. The formula of a molecule of methane is CH₄. Explain what is... show full transcript
Worked Solution & Example Answer:The photograph shows a Bunsen burner - Edexcel - GCSE Chemistry - Question 5 - 2013 - Paper 1
Step 1
Explain what is meant by a hydrocarbon.
Answer
A hydrocarbon is a type of organic compound that consists entirely of hydrogen and carbon atoms. In the case of methane (CH₄), it contains one carbon atom covalently bonded to four hydrogen atoms. Hydrocarbons can be found in various forms, including alkanes, alkenes, and alkynes, and they serve as the primary building blocks for many fuels and organic materials.
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Step 5
Describe the problems that can be caused by these products of complete and incomplete combustion.
Answer
When hydrocarbons burn completely, they produce carbon dioxide and water vapor, which contribute to the greenhouse effect and global warming. Incomplete combustion produces carbon monoxide, which is toxic and can lead to serious health issues such as headaches, dizziness, or even death due to its ability to bind with hemoglobin in the blood, reducing oxygen transport. Additionally, unburnt carbon can lead to particulate matter that causes air pollution, respiratory issues, and environmental damage.