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30 kwi 2013 · The instant cold packs are not pre-cooled—you just squeeze the cold pack and its starts to get cold. So how does it work? In this chemistry science fair project, you will investigate the chemical reaction that occurs in instant cold packs.
Your teacher grabs the first aid kit and pulls out an instant cold pack. After one good squeeze, the pack becomes really cold, almost instantly. What is happening?
You can make a basic cold pack by mixing a salt (such as potassium chloride) or soda (such as baking soda) with water. Mixing the two creates a chemical reaction that uses up energy, which makes the mixture colder. You can see which substance cools off water the most by trying out this experiment.
How do "instant" cold packs get cold when they are stored at room temperature, unlike a regular ice pack which must be stored in the freezer? In this lesson plan, students will explore several endothermic and exothermic reactions, and use their observations to choose the chemical reaction that best fits the design constraints for their own ...
Activity 1: cold packs. Use slide 6 of the PowerPoint to introduce endothermic reactions before the first activity. Learners will work in pairs or groups of three.
28 lut 2023 · Add the water to the baggie and seal with twist tie; squeeze and shake baggie. After a minute or so, a noticeable amount of heat will be produced. Have a volunteer verify. Pick a new volunteer for cold pak. Place warm water in ziploc baggie and have volunteer verify it is warm.
1 paź 2024 · Learn more about instant hot and cold packs by watching the video below. Then answer the following questions.
