Question

For a certain redox reaction, $E^0$ is positive. This means that:

• A. $\Delta G^0$ is positive, $K_{\text{eqm }}$ is greater than 1
• B. $\Delta G^0$ is positive, $K_{\text{eqm }}$ is less than 1
• C. $\Delta G^0$ is negative, $K_{\text{eqm }}$ is greater than 1
• D. $\Delta G^0$ is negative, $K_{\text{eqm }}^{c_m}$ is less than 1

Answer 1

Answer: (C)

$\Delta G^0=-nF{E}^0.......(i)$

$\Delta G^0=-2.303RT\log K_{eq}.....(ii)$

From eq (i) if $E^0$ is positive

then $\Delta G^0$ is negative In equation (ii), $\Delta G^0$ is negative

So; $\log K>0\Rightarrow K>1$