Question

Draw an energy diagram for a two-step reaction with${\mathbf{K}}_{\mathrm{eq}}$ > 1. Label the overall ${\mathbf{\Delta G}}^o$, transition states, and intermediate. Is${\mathbf{\Delta G}}^o$ positive or negative?

Short answer

${\mathbf{\Delta G}}^o\mathbf{}\mathbf{For}\mathbf{}\mathbf{the}\mathbf{}\mathbf{reaction}\mathbf{}\mathbf{is}\mathbf{}\mathbf{negative}$

Step-by-step solution

Energy profile diagram

An energy profile diagram is a plot of energy against the reaction coordinate. This shows when the reaction proceeds how the energy of the reactant and product changes.

Step 2: Relation between Keq and exergonic reaction

When${\mathbf{K}}_{\mathrm{eq}}$ greater than 1 then the energy is out in the reaction which means the reaction is exergonic.

When ${\mathbf{K}}_{\mathrm{eq}}$less than 1 is then the energy is in the reaction which means the reaction is endergonic.

If ${\mathbf{K}}_{\mathrm{eq}}$> 1 then${\mathbf{\Delta G}}^o$ is negative.

Energy profile diagram showing Keq> 1

If ${\mathbf{K}}_{\mathrm{eq}}$> 1 then ${\mathbf{\Delta G}}^o$is negative as shown in the following diagram.