When reaction is carried out at standard states then, at the equilibrium

When reaction is carried out at standard states then, at the equilibrium
  1. $\Delta H^{\circ}=0$
  2. $\Delta S^{\circ}=0$
  3. equilibrium constant $(k)=0$
  4. equilibrium constant $(k)=1$

Solution

We know, $ \Delta G^{\circ}=-R T \ln \frac{[k]}{[q]} $ where, $q=$ reaction quotient $ k=\text { equilibrium constant. } $ $\because$ At equilibrium, $ \begin{gathered} k=q \\ \left.\Delta G^{\circ}=0 \quad \text { \{for standard states }\right\} \end{gathered} $ So, equilibrium constant $ k=1 . $

Asked in: AP EAMCET 2021 (23 Aug Shift 1)

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