Lactones are cyclic esters and hydrolyze in a manner analogous to noncyclic esters, forming compounds containing acid and alcohol groups.
Acid hydrolysis of g -butyrolactone

Mechanism:

Basic hydrolysis of g -butyrolactone

Mechanism:

Lactones are cyclic esters and hydrolyze in a manner analogous to noncyclic esters, forming compounds containing acid and alcohol groups.