Question

When an athlete gets hurt they apply sometimes an instant cold pack to the injury. the instant cold pack works by mixing two chemicals that create a chemical reaction. what evidence is there that a chemical reaction is taking place in the cold pack?

a. change in odor
b. change in color
c. formation of gas
d. temperature change

Answer 1

yes of course the answer is D, temperature change.

Answer 2

the answer would be D