Name: How Hand Warmers Work (THERMAL IMAGING) - Periodic Table of Videos
Uploaded: 2020-03-27T17:31:35.000Z
Duration: 5 min 8 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

temperatures which will keep your hand warm.

Inside is sodium acetate that is dissolved in water.

Sodium acetate is made up of ions, positively

charged sodium, negatively charged acetate.

going alternately, positive, negative and so on.

acetate that was trapped on the metal surface.

It doesn't matter. You release something and as soon as you have that

first tiny nucleus, the precipitation takes place.

the temperature of the water drops and you

can see quite nicely with thermal imaging.

If you drop sodium acetate crystals into water the water gets cold.

water, is being used to pull these ions apart.

come out of solution, reform their crystals,

So the question is how can you get that energy

acetate as possible dissolved in the water.

and more of the salt. So if you go almost to

hundred degrees centigrade, you can dissolve

What you would imagine that if you dissolve all this

But the interesting thing is, that crystals cannot just form

They need to have tiny particles, doesn't really

matter what of, tiny bit of metal, a tiny

So if you have a really clean filtered solution,

So at least your hands will be warm when you walk

So that's what you have to do to finish it off,

And if you heat it for a longish time, all the sodium

cool it slowly it will be ready to use again.

spontaneously and suddenly release its heat.

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How Hand Warmers Work (THERMAL IMAGING) - Periodic Table of Videos

physical

description

matter

positive