Which of the following statements are true? 1. The voltage between the terminals

Question

Which of the following statements are true?

1. The voltage between the terminals of a battery in which the contents are in chemical equilibrium is equal to the standard potential.

2. The electrode of a battery at which oxidation takes place is not the same for charging and discharging.

3. More work can be extracted from a fuel cell than a combustion engine for the same overall reaction.

4. If you double all the coefficients in the overall chemical reaction in an electrochemical cell, the equilibrium constant and the emf change by the same factor.

Need Explanation Please?

Explanation / Answer

(2) TRUE - The electrode which acts as anode during charging can act as cathode during discharging.

(3) TRUE - Fuel cells are more efficient than combution engines.

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