What term describes a chemical explosion?

• A. Violent rupturing of a container due to the buildup of pressure.
• B. Explosives that burn rapidly but slower than the speed of sound.
• C. Created using high or low-explosive materials that release energy rapidly.
• D. Created from the fission or fusion of nuclear source material.

Answer: (C)

Energy release from a chemical explosion comes from the rapid breakdown or reaction of chemical bonds inside explosive compounds. This means the term should describe the mechanism—that fast, exothermic chemical reaction releasing a lot of gas and heat in a very short time—rather than just the visible result or a different kind of energy source. High explosives detonate and low explosives deflagrate, but both are chemical explosions because their power comes from chemical reactions, not from nuclear processes.

The description that specifies “created using high or low-explosive materials that release energy rapidly” fits best because it identifies the chemical origin and the rapid release of energy. The other statements describe a consequence (violent rupture), a slower burning mode of some explosives, or a nuclear process, none of which define chemical explosions.