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can you refreeze cold packs
Wiki User
∙ 13y ago
Anonymous
not sure but the bag says not to but I'm going to try it
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Can you make a rocket with a instant cold pack?
no
When you activate an instant cold pack water mixes with a chemical and the pack gets very cold This is an example of?
its an endothermic reaction
How is energy transferred when an instant cold pack is put on a muscle injury?
Heat energy is transferred by conduction from the muscle to the cold pack.
How is energy transferred when an instant cold pack is put on muscle injury?
Heat energy is transferred by conduction from the muscle to the cold pack.
How can we make an efficient instant cold pack by using ammonium nitrate and water?
egg
What type of reaction is occurring when you activate an instant cold pack?
endothermic because the energy is absorbed
Turkey and cheese sandwich How soon must you put your lunch in the refrigerator so that it remains safe to eat?
Refrigerate it as soon as possible. You don't want it unrefrigerated for more than 2 hours - or less if the ambient temperature is quite warm. There are some things that you could do to help: # Refrigerate all the fixin's so the sandwich starts out cold. # Make the sandwich the night before and refrigerate it overnight so it starts out cold. # Pack the sandwich with a frozen ice pack # Pack the sandwich with a refrigerated apple and/or juice box so they act like cold packs. # Make the sandwich ahead and freeze it (no lettuce or tomato, though).
What can be mixed to produce a very cold effect that doesn't give off an unsafe gas?
Instant cold packs use water and ammonium nitrate. The ammonium nitrate is a powder found inside the cold pack, and the water is inside a plastic container inside the cold pack. When the plastic container containing the water is broken and mixed with the ammonium nitrate, the water dissolves the ammonium nitrate, which is overall an endothermic reaction, causing the cold pack to get cold.
When you activate an instant cold pack and water mixes with a chemical and the pack gets very cold what example is this?
It is an example of an endothermic reaction. It is absorbing heat.
What are 'cold pack' and 'hot pack'?
cold pack contains cold stuff like ice, hot pack stuuf like fire
Explain which type of reaction exothermic or endothermic would be required to make a cold and a cold pack or hot pack?
You would have to have an Eacthomatdid reaction of chemcal chance to change a cold pack to a hot pack.
Should cold pack or heat make a lump down?
A cold pack is to make lumps go down and a heat pack is for when your sick.
