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The photograph shows a multifuel camping stove designed to use various fuels - Edexcel - GCSE Chemistry - Question 6 - 2011 - Paper 1
Question 6
The photograph shows a multifuel camping stove designed to use various fuels. This stove can burn the hydrocarbon fuels, propane gas, petrol, kerosene or diesel. (a... show full transcript
Worked Solution & Example Answer:The photograph shows a multifuel camping stove designed to use various fuels - Edexcel - GCSE Chemistry - Question 6 - 2011 - Paper 1
Step 1
Suggest two reasons why it is usually difficult to burn different hydrocarbon fuels efficiently in the same appliance.
Answer
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Hydrocarbon fuels can be in different states, such as gas or liquid, which affects the combustion process.
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Different hydrocarbons have varying viscosities and combustion properties, making some fuels more flammable than others.
Step 2
Step 3
Step 4
Evaluate the advantages and disadvantages of using hydrogen rather than petrol as a fuel for cars.
Answer
Advantages
- Plenty of water/raw material: Hydrogen can be produced from water, making it a renewable resource.
- Lower emissions: Hydrogen combustion produces only water as a byproduct, whereas petrol releases carbon dioxide.
- Potential for reduced global warming: Using hydrogen could help decrease greenhouse gas emissions.
Disadvantages
- Production challenges: Hydrogen must be produced, which requires energy, typically from fossil fuels, contributing to emissions.
- Storage and transport issues: Hydrogen is less efficient to store and transport than petrol, presenting safety concerns due to its gaseous state and potential leaks.
- Infrastructure costs: Developing the facilities and refueling stations for hydrogen would entail significant investment.