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2. Heat loss in a chemical system =

  • heat gain and loss to surroundings
  • heat gain to surroundings
  • heat loss from surroundings

3. Define chemical energy

  • a special form of potential energy that lies within chemical bonds
  • the heat content that is stored in a chemical system
  • energy cannot be created or destroyed

4. What is an example of an exothermic reaction?

  • self-heating cans
  • self-cooling cans
  • self destructing cans

5. Define enthalpy (H)

  • energy cannot be created or destroyed
  • the heat content that is stored in a chemical system
  • a special form of potential energy that lies within chemical bonds
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