Consider two types of drone: petrol-powered and hydrogen-fuel-cell powered - VCE - SSCE Chemistry - Question 15 - 2023 - Paper 1
Question 15
Consider two types of drone: petrol-powered and hydrogen-fuel-cell powered.
Which one of the following statements is correct about petrol-powered drones and hydroge... show full transcript
Worked Solution & Example Answer:Consider two types of drone: petrol-powered and hydrogen-fuel-cell powered - VCE - SSCE Chemistry - Question 15 - 2023 - Paper 1
Step 1
A. They both produce greenhouse gasses.
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Answer
This statement is correct. Petrol-powered drones emit greenhouse gases such as carbon dioxide (CO2) during combustion. Hydrogen-fuel-cell drones do not produce greenhouse gases in their operation as their only byproduct is water vapor.
Step 2
B. Only petrol-powered drones produce heat.
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Answer
This statement is incorrect. Both types of drones generate heat, although the mechanisms differ. Petrol engines generate heat during combustion, while hydrogen fuel cells produce heat in the electrochemical reaction.
Step 3
C. They both have the same energy transformations.
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Answer
This statement is false. Petrol-powered drones primarily undergo combustion to release energy, while hydrogen-fuel-cell drones convert chemical energy into electrical energy through electrochemical reactions.
Step 4
D. The overall reactions in hydrogen-fuel-cell powered drones are endothermic.
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Answer
This statement is also incorrect. The reactions in hydrogen fuel cells are exothermic as they release energy in the form of electricity and heat.
