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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 have different sizes of molecules, which impacts combustion efficiency. Larger molecules may not vaporize effectively in the appliance.
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Different hydrocarbon fuels have varying boiling points and viscosities, affecting how easily they ignite and burn in the same appliance.
Step 2
Step 3
Step 4
Evaluate the advantages and disadvantages of using hydrogen rather than petrol as a fuel for cars.
Answer
Advantages of Using Hydrogen:
- Environmental Benefits: Hydrogen combustion produces only water vapor, making it a clean alternative.
- Abundant Resource: Hydrogen can be produced from water, a plentiful raw material.
- Reduced Carbon Emissions: Using hydrogen helps to mitigate carbon emissions associated with traditional fuels.
Disadvantages of Using Hydrogen:
- Production Costs: Hydrogen production requires significant electricity and can be expensive.
- Storage Challenges: Hydrogen needs to be stored under high pressure, requiring stronger and heavier tanks.
- Infrastructure Needs: Current refueling infrastructure is not widespread, which can limit the practicality of hydrogen vehicles.