Freezing point of Napthalene

Freezing Point of Naphthalene I.         Purpose         To determine the freezing blame of a know substance, naphthalene II.         Materials          palisade brook                                    gas cum          try pipe                                    test tube clamps         thermometer                                    naphthalene          bunsen burner                                     look          water                                             stopwatch III.         Procedure         1.          garner the bunsen burner burner, atta ching unity 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.          localise the thermometer in the crystals so that it is environ by the naphthalene                  powder just now not touching the sides or bottom of the test tube. uptake a clamp to hold                  the thermometer in place.         5.         Ignite the Bunsen burner and using direct heat bunk the naphthalene powder until                  it completely t urns to a liquid. When the temperature reac! hes 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 chart later.         7.         Once the temperature has fallen to 70o, melt the naphthalene which is now                   rooted(p)         to remove the thermometer. properly dispose of the naphthalene liquid as                  instructed by the teacher.          IV.

        Data          bane 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  Â!  Â Â Â Â Â Â          78.3oC         1:30                           89.5oC                                             7:45 ... If you want to get a full essay, order it on our website: OrderEssay.net

If you want to get a full information about our service, visit our page: write my essay