Freezing Point of Naphthalene    I.              Purpose                To determine the freezing   stoppage of a know substance, naphthalene   II.              Materials                 fence in brook                                                        gas  book of facts                quiz  pipe                                                        test tube clamps               thermometer                                                        naphthalene                bunsen burner                                                         gape                water                                                                      stopwatch   III.              Procedure                1.               call the  etna burner,    attaching  iodine end of the hose to the burner and the                             other to a gas source.               2.              Assemble the ring  stand out so that a ring clamp is attached to the stand holding the                             test tube that will be  utilise in the experiment.               3.              Fill the test tube to approximately 1/8 capacity with naphthalene crystals.               4.                 turn out the thermometer in the crystals so that it is  environ by the naphthalene                             powder  yet not touching the sides or bottom of the test tube.   go for a clamp to hold                             the thermometer in place.               5.                Ignite the Bunsen burner and using direct heat  bunk the naphthalene powder until                             it  wholly turns    to a liquid.  When the temperature reaches !   approximately 90o                             Celsius, stop heating.               6.               strike the change in temperature from 90o  to 70o Celsius, recording the                             temperature at regular intervals,  preferably 15 seconds.  This  data will be used to                              bring a graph later.               7.              Once the temperature has fallen to 70o, melt the naphthalene which is now                              rooted(p)               to remove the thermometer.   right on dispose of the naphthalene liquid as                             instructed by the teacher.                 IV.

              Data                  reproval 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 ...                                        If you want to get a full essay, order it on our website: 
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