Air-activated foot warmer

Air-activated foot warmer

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Caption: 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.

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Keywords: activated carbon, cellulose, chemistry chemical, exothermic, foot warmer, heat, heat pad, heat source, iron, oxidation, packet, reaction, toe warmer, vermiculite, warmer

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