Homemade Cold Pack
In this quick and easy science experiment tutorial you will learn how to make a “cool” little ice pack. This activity is super easy and can be performed with a few items you already have at home. This science experiment uses an endothermic chemical reaction to create an impressive chill for your ice pack.
- Small ziplock baggie
- About one tablespoon of baking soda
- About one quarter cup of vinegar
- Thumbtack or safety pin
- Poke a small hole with the safety pin near the very top of the baggie. This will release pressure and keep your baggie from popping.
- Open the ziplock baggie and put the baking soda inside.
- Add the vinegar.
- Zip the baggie closed.
- The baking soda and vinegar will begin to react and bubble.
- The baggie will quickly expand and you will be able to feel the air escaping through the hole you created.
- Shake the baggie and mix the ingredients around.
- Place the baggie in your hand.
- You will feel a significant decrease in temperature.
How it Works:
When the vinegar and baking soda mix, an endothermic chemical reaction occurs that absorbs heat from the surroundings and reduces the temperature of the area.
Make This A Science Project:
What happens if you use a larger baggie? What happens if you use a different amount of baking soda? What happens if you use a different amount of water? What happens if you use very warm water to begin the experiment?