Heat of Reaction and Hess's Law

This Heat of Reaction and Hess's Law lab resource also includes:

Melting and burning might seem like opposites, but both exist as common examples of exothermic reactions. Scholars work with three different exothermic chemical reactions to determine the enthalpy changes. They measure and mix chemicals, measure temperature changes, and apply the appropriate formulas to determine how to enter data into the table.

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Instructional Ideas

  • Use beads to demonstrate the proper way to add pellets and the best rate of stirring for the various reactions
  • Create questions requiring pupils to interpret and describe the data after completing the experiments
Classroom Considerations

  • Use caution with chemicals, as some cause blindness and corrosion to the skin
Pros

  • Includes the balanced chemical equations as well as the common chemical names for each reaction
  • Offers two full pages of data tables to ease the burden on teachers
Cons

  • None