In this experiment you will use the ideal gas law and Avagadro's hypothesis to determine the molar mass of a low boiling liquid. Essentially, you will convert a liquid to a gas in a flask by raising its temperature to the boiling point of water. Any excess gas is allowed to escape through a tiny orifice. The amount of gas trapped in the flask is determined as well as the the volume of the flask, the temperature and the pressure. Using the ideal gas law, the number of moles of gas is determined, and then knowing the mass of gas trapped, the molecular mass is calculated.
To prepare for this lab, we suggest that you read the lab manual very carefully before coming to class. Also, read Oxtoby, Chapter 4, section 3.
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