Renewable fuels
Bioethanol and hydrogen are fuels that can be used instead of fossil fuels - Edexcel - GCSE Chemistry - Question 5 - 2015 - Paper 1
Question 5
Renewable fuels
Bioethanol and hydrogen are fuels that can be used instead of fossil fuels.
(a) Complete the sentence by putting a cross (✗) in the box next to you... show full transcript
Worked Solution & Example Answer:Renewable fuels
Bioethanol and hydrogen are fuels that can be used instead of fossil fuels - Edexcel - GCSE Chemistry - Question 5 - 2015 - Paper 1
Step 1
Complete the sentence by putting a cross (✗) in the box next to your answer.
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Answer
The correct option is:
☑ C produce heat energy when they burn.
This is because all fuels must release energy in the form of heat when they undergo combustion.
Step 2
Write the word equation for this reaction.
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Answer
The word equation for the reaction of hydrogen with oxygen to form water is:
Hydrogen + Oxygen → Water
Step 3
State one advantage of using hydrogen, rather than petrol, as a fuel for vehicles.
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Answer
One advantage of using hydrogen is that it is a renewable fuel, meaning it can be produced sustainably without depleting natural resources.
Step 4
Explain one disadvantage of using hydrogen as a fuel for vehicles.
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Answer
One disadvantage of using hydrogen is that it is a colorless and odorless gas, which makes it difficult to detect leaks. This poses safety risks as leaked hydrogen can mix with oxygen in the air and create an explosion hazard if ignited.
