A chemical reaction takes place to allow hand warmers to give off heat. This is an example of a(n) __________.
A. physical change
B. exothermic reaction
C. endothermic reaction
D. precipitate

Respuesta :

Answer:

Exothermic

Explanation:

Exothermic reactions release heat, endothermic absorb heat, and precipitate is a solid formed from a solution

Answer:

B.

Explanation:

Gives off heat,.