1.
On the basis of the following thermochemical data: (ΔfG∘H+(aq)=0\Delta_f G^\circ H^+(aq) = 0)

H2O(l)→H+(aq)+OH−(aq)H_2O(l) \rightarrow H^+(aq) + OH^-(aq); ΔH=57.32\Delta H = 57.32 kJ

H2(g)+12O2(g)→H2O(l)H_2(g) + \frac{1}{2}O_2(g) \rightarrow H_2O(l); ΔH=−286.20\Delta H = -286.20 kJ

The value of enthalpy of formation of OH−OH^- ion at 25∘25^\circC is:
Chemical Thermodynamics - Medium - Question