Which one of the following statements is correct?
A - VCE - SSCE Chemistry - Question 2 - 2023 - Paper 1
Question 2
Which one of the following statements is correct?
A. Fuel cells and galvanic cells produce heat.
B. Fuel cells have inert electrodes whereas galvanic cells do not.
C... show full transcript
Worked Solution & Example Answer:Which one of the following statements is correct?
A - VCE - SSCE Chemistry - Question 2 - 2023 - Paper 1
Step 1
A. Fuel cells and galvanic cells produce heat.
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Answer
Fuel cells primarily convert chemical energy to electrical energy without producing significant heat as a byproduct, contrasting with galvanic cells, which may release heat during the reaction. Thus, this statement is incorrect.
Step 2
B. Fuel cells have inert electrodes whereas galvanic cells do not.
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Answer
Fuel cells often utilize electrodes that participate in the electrochemical reactions, while galvanic cells can have electrodes that are not inert, depending on the materials used. Therefore, this statement is also incorrect.
Step 3
C. Fuel cells have porous electrodes whereas galvanic cells do not.
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Answer
Fuel cells often utilize porous electrodes to facilitate gas diffusion and reaction, while galvanic cells can also have porous electrodes, depending on design. This statement is misleading and considered incorrect.
Step 4
D. Fuel cells and galvanic cells operate when electrons flow through the electrolyte.
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Answer
This statement accurately describes the fundamental operation of both fuel cells and galvanic cells, where electron flow through the electrolyte is essential for generating electrical energy. Hence, this statement is correct.
