University of WashingtonCHEM 162CHEM 162 LAB 3-GRADED A

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Chem 162 Experiment #3: Intermolecular Forces Part II (take-home): Vapor Pressure and Enthalpy of Vaporization PURPOSE The purpose is to measure the enthalpies of vaporazation of pentane, diethyl e... ther, butanone, and 2- butanol. For each of these molecules, a portion of the enthalpy of vaporization is due to dispersion forces (all molecules have dispersion forces) and the other to a polar component. In the boxes provided below, draw the structural formula for each molecule (should be drawn by hand or using a drawing tool - not copy/pasted from a website). Draw the structural formula for pentane: Draw the structural formula for diethyl ether: Draw the structural formula for butanone: Draw the structural formula for 2-butanol: Note: All sections of this report, except the structural formulas, must be typed. Laboratory Waste Evaluation Laboratory waste is considered anything generated during an experiment that is disposed of down the sewer drain, thrown in the garbage, collected in a container for disposal by the UW Environmental Health & Safety department, or released into the environment. Based on the written lab procedure and your actions during the lab, list the identity and approximate amount (mass or volume) of waste that you generated while performing this experiment. ~5mL of unknown A solution (Maleic Acid) ~5mL of unknown B solution (Fumaric Acid) ~0.05g of unknown A solid ~0.05g of unknown B solid ~5mL of pH 4 buffer solution ~5mL of pH 7 buffer solution 2 capillary tubes ~400mL of DI water (& ice) Several kimwipes to clean the small vials. [Show More]

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