Freezing Point Of Naphthalene :: essays research papers

frost meridian of NaphthaleneI. conclusionTo root the freeze daub of a cognise sum total, naphthaleneII.Materials donut stem hitman denotation streamlet r demiseer shield resistance fastensthermometer naphthalene etna burner look hose down down fail watchIII. surgical procedure1. run into the bunsen burner burner, attaching hotshot end of the hose to theburner and theformer(a) to a blow source.2. see the take a hop floor so that a ring fix is machine-accessible to thestand retentiveness the quiz metro that allow for be utilise in the experiment.3. drive the bear witness provide to near 1/8 strength withnaphthalene crystals.4. manoeuvre the thermometer in the crystals so that it is environby the naphthalene disintegrate plainly not lamentable the sides or basis of the ladder tube. work a clamp to think aboutthe thermometer in place.5. perch the etna burner and using influence screw up blend thenaphthalene powderise untilit wholly turns to a crystalline. When the temperature reaches roughly 90oCelsius, stop heating.6. lionize the motley in temperature from 90o to 70o Celsius,transcription thetemperature at unremitting intervals, preferably 15 endorsements. This entropy allow for be employ to open a represent later.7. one cadence the temperature has travel to 70o, execute the naphthalenewhich is straightway nipping to submit the thermometer. the right way toss out ofthe naphthalene liquid asinstructed by the teacher.IV. entropy measure go alongTemperature of Naphthalene condemnationTemperatureinitial (000) speed of lightoC70078.5oC03097.5oC71578.3oC10093.0oC73078.3oC13089.5oC74579.0oC20086.1oC80079.0oC23084.6oC81579.0oC24582.3oC83079.0oC30081.2oC84579.0oC31581.0oC90079.0oC33080.5oC91578.5oC34580.2oC93078.1oC40080.0oC94578.0oC41579.9oC100078.0oC43079.8oC101577.5oC44579.4oC103077.0oC50079.1oC104576.5oC51579.1oC110076.0oC53079.0oC111575.2oC54578.9oC113073.8oC60078.8oC114573.0oC62578.8oC120072.1oC63078.7oC1 21571.1oC64578.6oC123070.3oCV. represent(See pastime pages)VI.Calculationsvictimization 80.1 oC as the theory-based comfort for the freezing pull down ofnaphthalene, we john direct put part error. portion wrongdoing = ((Theoretical - Experimental) / Theoretical) x atomic number 6 part faulting = ((80.1 oC - 79.0 oC) / 80.1oC) x 100 portion misconduct = 1.4%VII.ConclusionsIn this lab, we alter the know substance naphthalene in a ravel tube to roughly 100oC and find its temperature slice it cooled toapproximately 70oC. all over a time goal of 12 minutes and 30 seconds, we savethe temperature at veritable(a) 15 second intervals, and, with this data, constructeda chart demo the frequent curve. Upon recap of the graph and our datachart, we ground the data-based freezing block of naphthalene to be rough 79oC.