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Endothermic Reaction (79/104)
ENDOTHERMIC REACTION - INSTANT COLD PACK
Contains Ammonium Nitrate (Urea) And Water
A tube of ammonium-nitrate breaks in the bag of water, the mixture creates an endothermic reaction. Heat is absorbed and the mixture drops in temperature to about 35 F for 10 to 15 minutes.
Copyright:© 1994 Paul Silverman - Fundamental Photographs
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