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Chem162_IMForces_PartII_Report_042813

Diethyl ether enthalpy of vaporization x 100 193

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lab proved to be very accurate when compared against the literature values. diethyl ether: enthalpy of vaporization: (27.52-27) / 27 x 100% = 1.93% entropy of vaporization: abs(89.11 - 97) / 97 x 100% = 8.13% Our percent error for the enthalpy and entropy of vaporization for diethyl ether was again very small, therefore our data obtained during lab proved to be very accurate when compared with the literature values. 2-butanone: enthalpy of vaporization: (abs(31.68 - 35) / 35 x 100% = 9.49% entropy of vaporization: (89.02-89) / 89 x 100% = 0.02% Again our values for percent error of enthalpy and entropy of vaporization are very small. Our enthalpy of vaporization is a tad bit larger than for the previous data. This could be a result of human error like not reading the vapor pressure during the exact even intervals. 2-butanol: enthalpy of vaporization: (51.39 - 50) / 50 x 100% = 2.78% entropy of vaporization: abs(138.7 - 109) / 109 x 100% = 27.25% Our data for 2 butanol produced somewhat large percent errors for the entropy of vaporization but a small percent error for enthalpy of vaporization. This, again, could be due to human error such as miscopying data or not reading the vapor pressure during the even and exact intervals. Overall: The data for this lab was not controlled ery well, we had no way of determining whether or not the apparatus were correctly set up. There could have been a malfunction (ie leak) in the apparatus that we were unable to check, not to mention we were collecting data from multiple apparatuses, not one controlled setting/apparatus. When sharing data, one is prone to systematic errors, seeing as how one experimenter may read outputs from the apparatus slower than others, not to mention data was copied and recopied numerous times in order to obtain all of the data necessary for calculations which could definitely create miscalculations for our ending results.
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