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Reusable heaters rely on heat of crystallization of sodium acetate, that is, heat you obtain by crystallization of a solution. Coolers rely on heat of solvation, which is the heat that gets absorbe...
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Reusable heaters rely on heat of crystallization of sodium acetate, that is, heat you obtain by crystallization of a solution. Coolers rely on heat of solvation, which is the heat that gets absorbe...