JEE PYQ: Chemical Equilibrium Question 27
Question 27 - 2019 (11 Jan Shift 2)
For the equilibrium $2\text{H}_2\text{O} \rightleftharpoons \text{H}_3\text{O}^+ + \text{OH}^-$; the value of $\Delta G^\circ$ at 298 K is approximately:
(1) 100 kJ mol$^{-1}$ (2) $-80$ kJ mol$^{-1}$ (3) 80 kJ mol$^{-1}$ (4) $-100$ kJ mol$^{-1}$
Show Answer
Answer: (3) 80 kJ mol$^{-1}$
Solution
$\Delta G^\circ = -2.303 \times 8.314 \times 298 \times \log 10^{-14} \approx 80$ kJ/mol.
BETA
