The rotation-vibration spectrum of HCl is a standard exploration in many physical chemistry laboratories.  Through the use of an inquiry-based activity students explore this spectrum using previously obtained data.  Our students often demonstrate that a classroom exploration of quantized rotational and vibrational motions and associated energies does not fully translate into understanding of spectroscopic observations.  The activity is designed to challenge students’ uninformed misconceptions about molecular spectroscopy. Based on the POGIL model, the activity provides students with data that they must use to develop and redevelop their understanding of quantum rotors and oscillators.  The underlying purpose of the experiment is to challenge students’ perceptions of the goals of a physical chemistry lab course.  These goals, the structure of the activity, and recent observations of student work using this activity will be discussed.

Using the spectrum of HCl as a model building exercise

249th National Meeting (2015)

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