Which condition among the following holds tru | vedclass

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(A) For a reversible reaction $A \rightleftharpoons B$,the equilibrium constant $K$ is defined as $K = \frac{[B]}{[A]}$.At the state of half-completio

Vedclass · Accepted Answer

$\Delta G^{\circ} = 0$

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(A) For a reversible reaction $A \rightleftharpoons B$,the equilibrium constant $K$ is defined as $K = \frac{[B]}{[A]}$.At the state of half-completion,the concentration of reactant equals the concentration of product,i.e.,$[A] = [B]$.Therefore,$K = \frac{[B]}{[A]} = 1$.The relationship between standard Gibbs free energy change and the equilibrium constant is given by $\Delta G^{\circ} = -RT \ln K$.Substituting $K = 1$ into the equation,we get $\Delta G^{\circ} = -RT \ln(1)$.Since $\ln(1) = 0$,it follows that $\Delta G^{\circ} = 0$.

Which condition among the following holds true at the state of half-completion for the reaction $A \rightleftharpoons B$?

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