Crystallization of Supersaturated Sodium Acetate

A supersaturated solution of sodium acetate is poured onto one small sodium acetate crystal. Crystals form from the liquid immediately upon contact with the seed crystal. A thermometer shows that the crystallization process is exothermic. A chemical hot pack is shown as an example of a commercially available supersaturated solution.
The Reaction   
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Measuring the Temperature   
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Commercial Application   
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