self-sustaining, and self-contained exothermic chemical reaction that results in heat, gas, sound, light, or a combination of these effects.
(self-sustaining, and self-contained exothermic chemical reaction; results; in heat, gas, sound, light, or a combination of these effects)
self-sustaining, and self-contained exothermic chemical reaction
results
in heat, gas, sound, light, or a combination of these effects