Question

Equilibrium constant K is related to $E_{c e l l}^{o}$ and not $E_{c e l l}$ because

• A. $E_{c e l l}^{o}$ is easier to measure than $E_{c e l l}$
• B. $E_{c e l l}$ becomes zero at equilibrium point but $E_{c e l l}^{o}$ remains constant under all conditions
• C. at a given temperature, $E_{c e l l}$ changes hence value of K can not be measured
• D. any of the terms $E_{c e l l}$ or $E_{c e l l}^{o}$ can be used

Answer 1

Answer: (B)

At equilibrium, $E_{c e l l}$ becomes zero which means no current is generated by the cell at this point. $E_{c e l l}^{o}$ remains constant hence equilibrium constant is related to $E_{c e l l}^{o}$ .