What kind of explosion occurs due to a pressure build-up in a container?

A mechanical explosion is characterized by a sudden release of energy resulting from a pressure build-up within a container. This type of explosion occurs when the pressure inside a vessel exceeds its ability to contain it, leading to catastrophic failure and fragmentation. Common examples include explosions in pressure cookers, boilers, or gas cylinders, where the integrity of the vessel is compromised by excessive internal pressure.

In contrast, chemical explosions result from rapid chemical reactions that produce gas and heat, nuclear explosions stem from nuclear reactions releasing tremendous energy, and natural explosions can be associated with geological events like volcanic eruptions. These types of explosions do not primarily involve the mechanical failure of a container under pressure as is the case with a mechanical explosion. Thus, the context of pressure build-up leading to an explosive release directly aligns with the definition and characteristics of a mechanical explosion.