Aldehydes free energy change

The equilibrium between a carbonyl compound and its hydrate usually favours the aldehyde or ketone. Draw an energy profile to express this and mark the difference in free energy between the two compounds. The hydrate of cyclopropanonc is preferred to the ketone. How does the energy profile change for this compound ... 

In the foregoing discussions, we have considered those reactions which occur without a large change in free energy and emphasis has been placed on the fact that the reactions may lead to a net synthesis of thiol esters. It should be emphasized also that these reactions are for the most part freely reversible and that they may be regarded as reactions in which the energy of the thiol-ester bond is used for biosynthesis, viz., the synthesis of aldehydes, and keto acids. 

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