Heating Curves and Phase Diagrams

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Title: Heating Curves and Phase Diagrams Course: Chemistry 1412 – General Chemistry II Objective Activity One: In this experiment, the student will plot a vapor pressure vs. temperature graph and will discuss, interpret, and analyze it. Activity Two: In this experiment, a variety of values will be provided and the student is to recreate a phase diagram and interpret the meanings of the values. Activity Three: In this experiment, the temperature probe with start with a reading temperature that is well below the freezing point, and with that, the graph (Temp vs. Time) will be recorded and observed as time progresses in its natural direction. The Heating Curve will then be analyzed. Materials and Summary of Procedures Activity One: In this experiment you will need a Graphing Calculator and some Paper and Pencils. Activity Two: You will need a Pencil and a Ruler. Activity Three: You will need a Ring stand and a 600-mL beaker ¾ filled with distilled water, a Ring large enough to support the beaker, a Hot plate, some Highlighters or markers of various colors, 1 frozen temperature probe, a LabQuest computer with TI Connect and GraphLink, a Computer graphing software, and a Printer for the computer. Procedure Activity One: A graph that plots Pressure (Torr) vs. Temperature (Celsius) of three different substances (Chloroform L2, Ethanol L3, and Acetic Acid L4) will be provided by your instructor. With this graph, answer the post-lab questions that pertain to Activity One. Activity Two: Given information about ammonia, recreate a phase diagram. The triple point of ammonia is 195.42 K and 0.05997 atm. The critical point is 405.38 K and 111.5 atm. The normal freezing point is 195.45 K and the normal boiling point is 239.8 K. Be sure to include and label both axes, regions containing solid, liquid, and gas, normal boiling point, normal freezing
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