Frey Scientific Reusable Heat Pack, 8 x 8 Inches

Item #: 1392321

Show students an example of a chemical reaction that they can hold in their hand and feel with this reusable heat pack!

$20.89 $15.67
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In Stock - Typically Ships Within 2-3 Days
The hand warmer contains a super saturated solution of water and sodium acetate. Snapping the metal disc creates a chain reaction causing the solution to crystallize, giving off heat. The heat packs can be recharged back to the liquid state by boiling water for 10-15 minutes and allowed to slowly cool. 8 x 8 inches.
  • Shows how sodium acetate uses the process of supercooling to create heat
  • Great for everything from muscle aches to scientific demonstrations
  • Combines practical applications with a process that's fun to watch
  • Reusable and compact - perfect for classrooms

Includes:

  • 1 Heat Pack