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Determining Molar Enthalpy Using Hess’s Law

Targets Grades: 10-14
Accommodates 24 Students Working in Groups of 2

This calorimetry lab uses reliable reactions as students measure temperature changes, determine the calorimeter constant and ultimately calculate the molar enthalpy of formation for magnesium oxide using Hess’s Law. Students compare lab results to standard values. Ideal for Honors or AP Chemistry. State of the Art instructor’s manual features background material, easy to follow stepwise protocols, assessment questions, sample data, modeled calculations, and an answer key. Procedures can easily be divided or used as collaborative lessons. Additional equipment required: thermometers, balances, basic lab supplies, and Styrofoam cups. Meets AP Science Practices 2 & 7.

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