For the equilibrium,
Question:

For the equilibrium,

$2 \mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{H}_{3} \mathrm{O}^{+}+\mathrm{OH}^{-}$, the value of $\Delta \mathrm{G}^{\circ}$ at 298

$\mathrm{K}$ is approximately :-

1. $-80 \mathrm{~kJ} \mathrm{~mol}^{-1}$

2. $-100 \mathrm{~kJ} \mathrm{~mol}^{-1}$

3. $100 \mathrm{~kJ} \mathrm{~mol}^{-1}$

4. $80 \mathrm{~kJ} \mathrm{~mol}^{-1}$

Correct Option: , 4

Solution: