Here's why:

* Hydrolysis is the process of breaking down a molecule by adding water. This is a catabolic reaction, meaning it breaks down larger molecules into smaller ones.

* Exergonic reactions release energy and have a negative change in Gibbs free energy (ΔG < 0).

* Endergonic reactions require energy input and have a positive change in Gibbs free energy (ΔG > 0).

While the hydrolysis of glucose can release energy, it's not always the case. Whether a reaction is exergonic or endergonic depends on the specific conditions and the presence of enzymes.

For example, the hydrolysis of glucose to form glucose-6-phosphate is an endergonic reaction, as it requires energy input to proceed. However, the overall breakdown of glucose in cellular respiration (glycolysis, Krebs cycle, etc.) is exergonic.

In summary: While hydrolysis reactions can be exergonic in some cases, it's not a universal rule. It's important to consider the specific context and the reaction conditions.