hand warmer chemical reaction - in HD

**view in HD**

This is a quick vid showing the exothermic crystallisation reaction (or chemical reaction) of a simple hand warmer. Heating of the hand-warmer is triggered by snapping a small metal device which generates shock waves to initiate crystallisation.

I've slowed the reaction down to 30% (from 0:18 - 0:30) using Optical Flow in Apple's Motion 3.

Category:

Science & Technology

Tags:

• hand
• warmer
• chemical
• reaction
• hd
• 720p
• sony
• cybershot
• t500
• apple
• motion
• optical
• flow

[basilbunnyboo]

Does it only work once?

[thechilla]

no it recharges by being heated in boiling water - the solidified solution turns clear again and the whole process can be repeated - im not sure how many times but its a LOT!

[phfx]

Nice! And warm hands too!

[SquareoftheyearFM]

relaxing...

[thechilla]

@iAmSPRUCEY92 solitude by Phil Holland

[m185t3r]

its a physical change not a chemical reaction :P

[jplastow]

@adigal123 its sodium acetate

[TheColleywobbles]

@airsoftbbgun

It doesnt go back by its self! you have to boil it in hot water on the cooker for about 10 minutes !

[adigal123]

is it a special time of metal or can you use any?

[thechilla]

yep, if that doesnt work try putting the handwarmer in boiling water for 10mins, that usually reactivates and recharges the solution and crystalisation process.

[Crazyflasher10]

how do i make this xD?

[airsoftbbgun]

ive got 1 and its not goin bak to complete liquid to press the thing and make wax agen