[EugeneOregon]

This is my first real try at obtaining more precise boiling point data information. I intentionally allowed overlapping fractions to observe directly the temperature and pressure behavior. The pressure never rose above ¾ of one micron once flask thermometer reached about 50C. ¾ of one micron is considered a very deep vacuum and is in fact the lower limit of what a Pirani sensor can normally detect. Vacuum pump is Edwards model 28 and is very quiet but is running in the background.

Overlapping fraction seen as small bubbles at first, grow from the sides of the collection bulb slowly and not from neck connection. I take this to mean that the majority of condensate is condensing inside the bulb at that point.

THC is identified at "first drop" into collection bulb at 142C with an error on my part I estimate at +/- 2C. My next lab I plan to observe with time lapse mode which can show exact moment of "first drop" into collection flask.

The videos are shot in high def on my ipad but of necessity the Book Creator app I use to piece them together crunches everything down when exporting as a video for youtube.
https://www.youtube.com/watch?v=rD5tIdnDNl0