exothermic

The reaction is "exothermic," meaning it produces heat as well as steam.

But at a certain point, he explained, those reactions become exothermic — that is, they generate heat themselves — which kicks the reactions into high gear.

Because sea turtles are exothermic, they get their body temperatures from their surroundings, like air or water.

The injection creates an exothermic reaction that ignites the fuels inside the balls.

A footnote to the charging document said such explosive material “gives off heat and energy through a rapid exothermic reaction when initiated by heat, shock or friction.”