Air-activated foot warmer. Disposable air-activated foot warmer packet. The warmer contains iron, water, cellulose, vermiculite, activated carbon and salt. When exposed to air, iron oxidizes and produces heat: Fe + O2 -> Fe2O3. Here a digital thermometer shows that the warmer's temperature is increased to 51.3 C. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Giphotostock |
Taille de l’image : | 5159 px × 3432 px |
Model Release : | Non requis |
Restrictions : |
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