Friday, September 27, 2013

Freezing point of Napthalene

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.
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        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: BestEssayCheap.com

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