Lab 7 Intermolecular Forces

Lab 7 Intermolecular Forces - 00:28 Intermolecular Forces &...

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00:28 Experiment #7 William Brown Section #509 Lab Partner: Kevin Deal Summary : In this experiment, I performed two different measurements that helped me  establish the relative strength of intermolecular forces in some organic liquids. In  summary, I soaked pieces of filter paper in different alcohols and alkanes (ethanol,  propanol, butanol, pentane, methanol, hexane) and then measured the rate at which the  temperature lowered on the paper, as well as the lowest and highest temperatures  reached. We observed that the weaker the intermolecular forces and the lower the  molecular weight, the more rapidly the temperature decreased. In part B, we had four  water baths of differing temperatures in beakers. We then put an Erlenmeyer flask filled  with either ethanol or methanol into the bath in order to see how the vapor pressure of  the alcohol reacted. We learned that the methanol reacted in a more volatile manner  than ethanol. Results : In the ethanol vs. proponol experiment, the ethanol’s temperature decreased  more rapidly than the proponol, as shown in this plot. The minimum and maximum  temperature for ethanol were 14.64 and 25.50 degrees Celsius, respectively. The 
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This note was uploaded on 10/05/2011 for the course THAR 281 taught by Professor Staff during the Fall '07 term at Texas A&M.

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Lab 7 Intermolecular Forces - 00:28 Intermolecular Forces &...

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