Question

Draw an energy diagram for a one-step reaction with ${\mathbf{K}}_{\mathrm{eq}}\mathbf{<}\mathbf{1}$. Label the parts of the diagram corresponding to reactants, products, transition state, ${\mathbf{\Delta G}}^o$, and${\mathbf{\Delta G}}^{\#}$ . Is${\mathbf{\Delta G}}^o$ positive or negative?

Short answer

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

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

If ${\text{K}}_{\text{eq}}$< 1 then ${\text{ΔG}}^{\text{o}}$is positive.

Energy profile diagram showing Keq < 1

If ${\text{K}}_{\text{eq}}$< 1 then ${\text{ΔG}}^{\text{o}}$is positive as shown in the following diagram