Question

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

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

Answer 1

Answer: (A), (C)

Nernst equation is

$E_{\text{cell }}=E_{\text{cell }}^{\circ }-\frac{2.303RT}{nF}\log \frac{[P]}{[R]}$

$\Delta G=-nF{E}_{\text{cell }},\Delta G^{\circ }=-nF{E}_{\text{cell }}^{\circ }$

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

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