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360Science™: Designing a Handwarmer


Students follow a detailed procedure to study the energy change associated with the dissolution of four salts in water. Students must then interpret the data to determine the best salt to be used as a handwarmer based on various properties. Students also calculate the molar heat of solution for the various solids.


  • Enthalpy change
  • Calorimetry
  • Heat of solution
  • Specific heat
  • Exothermic vs. endothermic
  • System and surroundings