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Application of exothermic reactions to make a hand warmer

Application of exothermic reactions to make a hand warmer. By Ansam Anas Agarib. If you would like to make a hand warmer, what are the chemicals that you would use?. Calcium oxide-slaking lime Calcium carbonate CaCO 3 )- slaking lime Calcium chloride

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Application of exothermic reactions to make a hand warmer

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  1. Application of exothermic reactions to make a hand warmer By AnsamAnasAgarib

  2. If you would like to make a hand warmer, what are the chemicals that you would use? • Calcium oxide-slaking lime • Calcium carbonate CaCO3)- slaking lime • Calcium chloride • Potassium Carbonate(K2CO3) -Heat from cold wood ashes

  3. Slaking limeThe second exothermic process we tried for our hand warmer involved the 'slaking' of quicklime, which involves a chemical reaction or two. We took ordinary chalk (calcium carbonate, CaCO3) and heated it to between 2000 and 2500°F (1200 -1400°C). At these temperatures, the calcium carbonate releases carbon dioxide gas (CO2) and is converted into quicklime (calcium oxide, CaO).

  4. When you add water to the quicklime, a process called 'slaking,' a vigorous reaction takes place and lots of heat is generated. The product of that reaction is a compound called 'slaked' lime (calcium hydroxide, Ca(OH)2). • Although aqueous solutions of 'slaked' lime are alkaline, its solubility in water is so low that the solution would not be a caustic hazard (causing chemical burns) used in a hand warmer. Given the right amount of lime, the amount of heat generated would be suitable for our purposes. The reaction is also portable and easily reproducible.

  5. Now,let’s see how is it done

  6. Hope you liked it • THANKS FOR YOUR CO-OPERATION

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