Question

For a spontaneous reaction the $\Delta G$, equilibrium constant $K$ and $E{{}^0}_{cell}$ will be respectively:

• A. $-ve,>1,-ve$
• B. $-ve,<1,-ve$
• C. $+ve,>1,-ve$
• D. $-ve,>1,+ve$

Answer 1

The correct option is D $-ve,>1,+ve$

we know $\Delta G=-RTlnK=-nF{E}^{\circ }$
We know for a spontaneous reaction
$\Delta G<0$.

$\therefore -RTlnK<0$

$\therefore lnK>0$

$\therefore K>1$

and $-nF{E}^{\circ }<0$

$\therefore E_{cell}^{\circ }>0$