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Ammonium nitrate crystals and water. When you pop the water pack, the two undergo an endothermic reaction, forming ammonium and nitrate ions (NH4+ & NO3-). Water breaks the two parts of NH4NO3 into the positive and negative parts, and it takes heat energy from the surrounding area to make the separation. When it dries it recombines and releases that heat (not observed because water gets colder when it evaporates). So if you CAREFULLY cut that bag open and dry it, it will do the same thing again. I wouldn't want to eat the crystals or the end liquid. plant fertilizers don't make good food.
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What could be the difference between iceberg ice and pack ice?
An iceberg is a piece of ice that has calved or broken off from a glacier, and is therefore fresh water. Pack ice (or drift ice) is frozen ocean, and therefore salt water.
What makes ice float on the surface of water?
when crystal structure of ice breaks, the liberated molecule become associated so strongly that they pack together more closely than in ice crystal itself. as a consequence ice becomes less denser than water and floats on it
Why are the gases in each layer of ice different?
Layers of ice in a glacier or permanent ice pack form a sort of history. Snow falls on top of older layers of snow, and as it builds up the snow at the bottom gets compressed into ice. The gases in each layer represent the composition of the air at the time
Why a ice pack is shaken after the inner bag has burst?
to enable the particles of the ammonium nitrate inside it dissolve faster or react faster
How will global warming impact the natural selection selection process on polar bears?
If, and it's a big if, climate change caused the ice cap in the Arctic to disappear, It is hard to say what exactly would happen to the polar bear. Polar bears have been known to forage like other bears on berries and grasses, and most likely would do so if we lost the ice pack. The polar bear is a very close cousin of the brown bear, and if they began to have regular contact, hybridization could spell doom for the ice bear. But, all this is conjecture at this point. The ice pack is at its largest in decades, so the polar bear appears safe for now.
How is heat transferred when a person holds an ice pack?
Heat will travel from the person's hand into the ice pack, where it will excite the molecules there and warm the ice pack.
How is heat transferred when a person holds a ice pack?
Heat will travel from the person's hand into the ice pack, where it will excite the molecules there and warm the ice pack.
Does ice pack cause redness?
Yes an ice pack does cause redness from cooling the skin.
In what pack is the white Arctic wolf?
Ice Pack
What is pack ice?
Polar pack ice is snow which has been compacted into solid chunks of ice. It is found in the most extreme Northern and Southern regions of the planet.
Can you be poisoned from a cold pack?
Yes. It is possible to be poisoned by an ice pack.
Do I put an ice pack or or a heating pad on a spider bite?
You would generally use an ice pack on a spider bite.
What is ice pack in first aid?
An ice pack can be used to stop swelling and bruising and sometimes pain. It slows down the rush of all the blood in your body trying to rush to the injury.
What is an example for a gracier?
it is a pack of ice
What is polar pack ice?
Polar pack ice is snow which has been compacted into solid chunks of ice. It is found in the most extreme Northern and Southern regions of the planet.
How do you make an ice pack?
grab a ziploc bag and put ice in it
What could be the difference between iceberg ice and pack ice?
An iceberg is a piece of ice that has calved or broken off from a glacier, and is therefore fresh water. Pack ice (or drift ice) is frozen ocean, and therefore salt water.
