Sodium acetate heating pad
Sodium acetate is aswell acclimated in heating pads, duke warmers, and hot ice. Sodium acetate trihydrate crystals cook at 137.12 °F/58.4 °C,(to 136.4 °F/58 °C) abandoning in their baptize of crystallization. When they are acrimonious accomplished the melting point and after accustomed to cool, the aqueous band-aid becomes supersaturated. This band-aid is able of cooling to allowance temperature after basic crystals. By acute on a metal disc aural the heating pad, a nucleation centre is formed, causing the band-aid to accumulate aback into solid sodium acetate trihydrate. The bond-forming action of condensate is exothermic. The abeyant calefaction of admixture is about 264–289 kJ/kg. Unlike some types of calefaction packs, such as those abased aloft irreversible actinic reactions, sodium acetate calefaction packs can be calmly reused by abandoning the crystals in baking baptize for a few account until the crystals are absolutely dissolved.