Question

Which of the following correctly represents Nernst equation?
[P = products, R = reactants]

• A. $\Delta G=\Delta G^{\circ}+2.303 R T \log \frac{[P]}{[R]}$
• B. $\Delta G=\Delta G^{\circ}-2.303 R T \log \frac{[P]}{[R]}$
• C. $\Delta G^{\circ}=\Delta G+2.303 R T \log \frac{[R]}{[P]}$
• D. $\Delta G^{\circ}=\Delta G-2.303 R T \log \frac{[R]}{[P]}$

Answer 1

Answer: (A), (C)

Nernst equation is

$E_{\text {cell }}=E_{\text {cell }}^{\circ}-\frac{2.303 R T}{n F} \log \frac{[P]}{[R]}$

$\Delta\, G=-n F E_{\text {cell }}, \Delta G^{\circ}=-n F E_{\text {cell }}^{\circ}$

$\Delta \,G=\Delta G^{\circ}+2.303 R T \log \frac{[P]}{[R]}$

$\Delta\,G^{\circ}=\Delta G+2303 R T \log \frac{[R]}{[P]}$