Question

Equilibrium constant K is related to $E_{cell}^o$ and not $E_{cell}$ because

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

Answer 1

Answer: (B)

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