Part 1 of Essay
I. Purpose To determine the freezing point of a known substance, naphthalene II. Materials ringstand gas source test tube test tube clamps thermometer naphthalene Bunsen burner goggles hose stopwatch III. Procedure 1. Assemble the Bunsen burner, attaching one end of the hose to the burner and the ....

Part 2 of Essay
.... Celsius, recording the temperature at regular intervals, preferably 15 seconds. This data will be used to make a chart later. 7. Once the temperature has fallen to 70o, melt the naphthalene which is now frozen to remove the thermometer. Properly dispose of the naphthalene liquid as instructed by the teacher. IV. Data Time Elapsed Temperature of Naphthalene Time Temperature Initial (0:00) 100oC 7:00 78.5oC 0:30 97.5oC 7:15 78.3oC 1:00 93.0oC 7:30 78.3oC 1:30 89.5oC 7:45 7 ....