Consider the following statements about galvanic cells and fuel cells - VCE - SSCE Chemistry - Question 8 - 2019 - Paper 1
Question 8
Consider the following statements about galvanic cells and fuel cells.
Statement number | Statement
--- | ---
1 | The overall reaction is exothermic.
2 | Electrons ... show full transcript
Worked Solution & Example Answer:Consider the following statements about galvanic cells and fuel cells - VCE - SSCE Chemistry - Question 8 - 2019 - Paper 1
Step 1
Evaluate Statement 1
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Answer
The overall reaction in galvanic cells is indeed exothermic, indicating that energy is released. This is true for both galvanic and fuel cells.
Step 2
Evaluate Statement 2
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Answer
Electrons are consumed at the positive electrode (cathode) in galvanic cells, not the negative electrode (anode). Hence, this statement is incorrect.
Step 3
Evaluate Statement 3
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Answer
Typically, both the reducing agent and the oxidising agent are present in separate compartments (half-cells) and are not stored in each half-cell in both types of cells. This statement is generally misleading.
Step 4
Evaluate Statement 4
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Answer
The electrodes do come in contact with the reactants and the electrolyte in both galvanic and fuel cells, making this statement correct.
Step 5
Evaluate Statement 5
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Answer
In galvanic cells, the electrodes do not need to be replaced regularly as they can operate for long periods. In contrast, fuel cells may need replacement. Hence, this statement is not universally true.
Step 6
Final Conclusion
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Answer
Based on the evaluations, only statements 1 and 4 are consistently true for both types of cells. Therefore, the answer is D: statement numbers 1, 3, and 5 is incorrect and does not apply to both types.
