Lesson 4 - Enthalpy of Reaction
Curriculum Expectations
D2.2 write thermochemical equations, expressing the energy change as a ∆H value or as a heat term in the equation.
D2.4 plan and conduct an inquiry to calculate, using a calorimeter, the heat of reaction of a substance (e.g., the heat of solution of ammonium nitrate, or of combustion of a hydrocarbon), compare the actual heat of reaction to the theoretical value, and suggest sources of experimental error.
D2.4 plan and conduct an inquiry to calculate, using a calorimeter, the heat of reaction of a substance (e.g., the heat of solution of ammonium nitrate, or of combustion of a hydrocarbon), compare the actual heat of reaction to the theoretical value, and suggest sources of experimental error.
Lesson Hook
This Crash Course Chemistry video is an excellent resource that reviews concepts covered in this unit up until this point. It also provides a visual resource for students of the procedure of the laboratory period today.
Pedagogical approach
Laboratory 1: Enthalpy of reaction - HCl and NaOH
Equipment
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Safety
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Procedure
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Laboratory 2: Design your own cooling pack
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Activities modified from Grade 12 Chemistry - McGraw Hill
Consolidation: "Gimmie 2"
Students discuss the class with their elbow-partner or table group and identify two things that they each learned about the class related to thermochemistry. After discussion time, ask if any students can volunteer their ideas and facilitate a class discussion.