Question

$A$ reaction attains equilibrium state under standard conditions, then what is incorrect for this?

• A. Equilibrium constant $K=0$
• B. Equilibrium constant $K=1$
• C. $\Delta G^{°}=0$ and $\Delta H^{°}=T\Delta S^{°}$
• D. $\Delta G=0$ and $\Delta H=T\Delta S$

Answer 1

Answer: (A)

$\Delta G^{\circ }=0$ at equilibrium under standard state.
Also, at equilibrium, $\Delta G=0$
$\therefore \Delta H^{\circ }-T\Delta S^{\circ }=0$
Also, $\Delta G^{\circ }=2.303RTlogK$
$\therefore K=1$