Which is faster, the hydrolysis of an ester or the aminolysis of the same ester? which is faster, the hydrolysis of an ester or the aminolysis of the same ester? the hydrolysis of an ester the aminolysis of an ester?

Ester reacts with both an amine that is known as aminolysis when ester reacts with an alcohol or water is known as hydrolysis of ester.

But between both the reactions, aminolysis that is its reaction with an amine is faster than that of hydrolysis as amine is a better nucleophile,  that can attack carbonyl carbon more readily than that of hydroxide and thus reaction occurs at a faster rate.

The both reaction can be seen in the image attached.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.