exp11_template

exp11_template - Experiment 11 Evaporation and...

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Unformatted text preview: Experiment 11 Evaporation and Intermolecular Forces SPRING 2008 Name TA Type name Type TA's name Lab Day and Time Section Type day & time Type section number Documentation List references here (Lab Partners, Lab Manual, Textbook, etc.) GRADING RUBRIC Possible Points Introduction Purpose of report Goals of the experiment Materials and Methods Reference lab manual Only describe deviations Results and Discussion Inserted titles for tables Inserted graphs into template Inserted captions for each graph Showed complete sample calculations Summarized all data in tables Answered questions completely Error analysis Laboratory Technique 10 Points Received 10 60 20 TOTAL (100) TA Comments/Suggestions: CHEMISTRY 102L REPORT TEMPLATE Evaporation and Intermolecular Forces Introduction EXPT. 11 The purpose of this report is describe what you are trying to convey with the report. The objective of the experiment was describe the objectives of the experiment. Materials and Methods The procedure for this experiment was taken from reference the lab manual. Describe any deviations from the given procedure. This should be written in past tense using clear paragraph organization following the guidelines for writing experimental procedures. Results and Discussion Describe the data that were collected in this experiment and refer to Figures 1, 2, and 3. Insert DataStudio plot of temperature vs. time. Include the three alkanes on one graph. Figure 1. Insert caption that describes the graph. Insert DataStudio plot of temp vs. time. Include the three straight chain alcohols on one graph. Figure 2. Insert caption that describes the graph. Insert DataStudio plot of temp vs. time. Include the three structural isomers of butanol on one graph.. Figure 3. Insert caption that describes the graph. Define the Clausius-Clapeyron equation. Explain how the equation is related to this experiment by referring to Figures 4-6. Insert DataStudio plot of ln P vs. 1/T. Include the three alkanes on one graph. Figure 4. Insert caption that describes the graph. Insert DataStudio plot of ln P vs. 1/T. Include the three straight chain alcohols on one graph. Figure 5. Insert caption that describes the graph. Insert DataStudio plot of ln P vs. 1/T. Include the three structural isomers of butanol on one graph. Figure 6. Insert caption that describes the graph. Describe how the graphs of ln P vs. 1/T can be used to determine the enthalpy of vaporization. Show a sample calculation of enthalpy of vaporization and refer to data in Table 1. Insert sample calculation of enthalpy of vaporization. Table 1. Insert title for the table 1 and include reference for literature values Slope from linear Calculated Hvap Literature Hvap Sample regression of (kJ/mol) (kJ/mol) ln P vs. 1/T heptane octane nonane methanol ethanol 1-propanol 1-butanol sec-butanol tert-butanol Percent Error Describe the relationship between molar mass, enthalpy of vaporization and strength of intermolecular forces. Refer to figure 7 and 8 in your discussion. If there are any discrepancies, how can you account for them? Insert DataStudio plot of the enthalpy of vaporization vs. molar mass for the alkanes. Figure 7. Insert caption that describes the graph. Insert DataStudio plot of the enthalpy of vaporization vs. molar mass for the straight chain alcohols. Figure 8. Insert caption that describes the graph. Compare and contrast the data for the alkanes to the alcohols. Do you see similar trends? Are the enthalpy of vaporization values similar or different? What type of intermolecular forces are involved? Refer to data in Table 2 when making similar types of comparisons. Table 2. Insert title for table 2. Sample heptane octane nonane methanol ethanol 1-propanol Structural Formula Calculated Hvap (kJ/mol) Molar Mass (g/mol) By referring to the data presented in Table 3, which of these isomers has the strongest intermolecular forces? Which has the weakest? Based on your data, describe how the molecular structure of a molecule is related to intermolecular forces. If there are any discrepancies, how can you account for them? Table 3. Insert title for Table 3. Alcohols n-butanol sec-butanol tert-butanol Structural Formula Calculated Hvap (kJ/mol) IMF Ranking ...
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This note was uploaded on 03/22/2008 for the course CHEM 112 taught by Professor Bilts during the Spring '08 term at Linn Tech.

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