On the basis of the following thermochemical data : (… = 0) H₂O(l) … H⁺(aq) + OH⁻(aq); … = 57.32 kJ H₂(g) + … H₂O(l); … = -286.20 kJ The value of enthalpy of formation of OH^− ion at 25^oC is :

Thermodynamics

JEE Main 2009 · Annual, Paper 1 · Q2343

ChemistryHard84×since 2002Q2343

On the basis of the following thermochemical data : (

\Delta _fG^oH^+_{(aq)}

= 0) H₂O(l)

\to

H⁺(aq) + OH⁻(aq);

\Delta H

= 57.32 kJ H₂(g) +

{1 \over 2} O_2(g) \to

H₂O(l);

\Delta H

= -286.20 kJ The value of enthalpy of formation of OH^− ion at 25^oC is :