When Holly injures her shoulder playing baseball, she uses an instant ice pack to reduce the swelling. She breaks the inner, activator portion of the instant cold pack releasing the solid urea into the surrounding water. What process does Holly observe as she uses the cold pack? A) Urea absorbs and releases heat energy into the surroundings. B) When the urea dissolves it absorbs heat and the cold pack gets colder. C) The urea causes the surroundings heat up as the cold pack releases energy. D) As the urea mixes in the water it releases heat making the cold pack colder.

Breaking the inner portion activates the instant cold pack thereby releasing the solid urea into the surrounding water makes the urea to react with the water and makes it cold. This is because the reaction that takes place then undergoes an endothermic reaction, Hence heat is absorbed from the surroundings and the cold pack gets colder

Oseni Oseni · Answer 2 · 2021-11-23T12:26:10+01:00

The process that Holly observes as she uses the cold pack would be that when the urea dissolves, it absorbs heat and the cold pack gets colder.

Cold packs generally work based on the principle of endothermic reactions. In endothermic reactions, heat is absorbed from the surrounding, making reaction vessels to be colder than before the reaction.

When the urea in the pack dissolves in the surrounding water within the pack, an endothermic reaction ensues making the pack become colder than usual.

Hot packs work in a completely opposite process by dispersing heat into the surrounding.

More on cold packs can be found here: https://brainly.com/question/14370354