Question

For a certain redox reaction, $Eº$is positive this means that

• A. $\Delta Gº$is positive, K is greater than 1
• B. $\Delta Gº$ is positive, K is less than 1
• C. $\Delta Gº$ is negative, K is greater than 1
• D. $\Delta Gº$ is negative, K is less than 1

Answer 1

Answer: (C)

$\Delta Gº$ is negative, K is greater than 1

Answer 2

l$\Delta Gº = - nFEº$

$\Delta Gº = - 2.303Rt\log K$

From equation (i) if $Eº$ is positive

Then $\Delta Gº$ is negative.

In equation (ii), $\Delta Gº$is negative

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