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. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Giphotostock |
Bildgröße: | 5159 px × 3432 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: |
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