exp10 - xxxxx Section x 11/29/06 Gas Laws: Experiment #10...

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xxxxx Section x 11/29/06 Gas Laws: Experiment #10 Purpose: The purpose of this lab was to use the Dumas Method to determine the molar mass of an unidentified liquid. Experimental Methods: For details on how to perform the experiment, see the lab instructions for Experiment #10. Data and Observations: The following table includes measurements that are relevant to the lab. Air pressure 29.92 in. Hg Mass of beaker 75.146 g Mass of beaker + vapor 75.366 g Volume of beaker 148 ml Water temp at end 84ºC The liquid that was used for the experiment was Unknown 1. It was a blue liquid. There was really only one change that occurred during the experiment. The quantity of the liquid decreases as evaporation took place. Even though it seemed as if the liquid was still present in the flask, it was really just blue residue for the dye that was in the liquid. For the purpose of this experiment it was assumed that: the temperature of the gas was the same as the temperature of the water the mass of the vapor equaled the mass of the liquid at low temperatures
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exp10 - xxxxx Section x 11/29/06 Gas Laws: Experiment #10...

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