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Instant hot and cold packs are used by athletes to quickly and conveniently treat an injury. They last for about 20 minutes. The packs take advantage of chemicals that either absorb a lot of heat or release a lot of heat when dissolved in water. When a chemical process absorbs a lot of heat it is called endothermic. When heat is released, it is called exothermic.
In cold packs, ammonium nitrate is used because it absorbs a lot of heat when it dissolves in water. The water and ammonium nitrate are in separate compartments in the pack. When the cold pack is needed, the chambers are broken and the ammonium nitrate dissolves in the water, absorbing heat and making the pack as cold as 0C.
In hot packs, calcium chloride or magnesium sulphate are used, along with the water. They release heat when the chambers are broken and the chemical dissolves in the water. A hot pack can reach a temperature of 90C.
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∙ 7y ago
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What keeps lunch cold?
Ice packs keeps lunches cold.
Do cold packs absorb energy?
No, they release energy.
Instant cold packs can be reused?
Instant cold packs cannot be reused once they are activated. The chemical makeup inside the package was created for one time use.
Do dogs work in packs?
Dogs, known to be "A Man's Best Friend" only work in packs in the wild. Canines can also work in packs if they are pets, but it is way less likely to work in packs more than wild ones. So, in the conclusion, the answer is: Yes, wild dogs work in packs.
What are some retailers that sell cold packs?
Cold packs can be purchased at most big box stores such as Walmart or Target in their first aid section. They are commonly known as ice packs where one can either break the bag to make instant cold to treat injuries or they can be shaken to create the same effect.
What helps bad backs?
streching or cold then hot packs
What chemicals react to make a hot pack hot?
Yes, hot packs have exothermic reactions (the contents create heat) and cold packs have endothermic reactions (they require heat to occur, therefore making the surroundings colder). In hot packs its a reaction between water and a salt solution, and in cold packs its normally water and ammonium nitrate. peeace
Do Walgreen's cold pack contain ammoniun nitrate?
is there ammonium nitrate found in walgreens cold packs
Which invention uses liquids that are very cold and absorb heat?
Cold packs, for bruises are one invention.
Where can you find ammonium nirate?
inside most instant cold packs
Why wont your texture packs work?
Your texture packs may not work because you are using the incorrect version, so you will need to apply a patch to make them work.
What are some Cooling treatments?
Sponge baths, cold compresses, and cold packs are all wet cooling treatments
