Intermolecular Forces: Phase Changes & Properties Objectives: 1. Interpret the heating curve of substance X 2. Construct the cooling curve of a pure substance using experimental data. 3. Use phase diagram of pure substance to determine its phase at a given temperature and pressure 4. Relate the properties of a substances to intermolecular forces that operate among its molecules. B. Creating a Cooling Curve: Draw a graph showing gaseous acetone changing to solid acetone using the information given. Be sure to label temperature on the "y-axis" and time in minutes on the "x-axis". Check off each box as you add additional information to your graph so that none is missed. Boiling Point = 56°C Freezing Point = -95°C Starting temperature = 65°C 1. After five minutes, gaseous acetone starts to turn liquid. It takes five minutes to liquify completely. 2. After 15 more minutes, it begines to freeze. It freezes completely for 10 minutes. 3. It is further cooled for 5 more minutes until acetone reaches -105°C 4. Label "Freezing" where this takes place. 5. Label "Condensation" where this takes place 6. Label "Phase Change" where a phase change occurs. 7. Indicate where acetone is only a SOLID, only a LIQUID, and only a GAS. 8. Of the three phases, label which phase has: Weakest IMF, Strongest IMF, and Medium IMF.
Intermolecular Forces: Phase Changes & Properties
Objectives:
1. Interpret the heating curve of substance X
2. Construct the cooling curve of a pure substance using experimental data.
3. Use phase diagram of pure substance to determine its phase at a given temperature and pressure
4. Relate the properties of a substances to intermolecular forces that operate among its molecules.
B. Creating a Cooling Curve:
Draw a graph showing gaseous acetone changing to solid acetone using the information given. Be sure to label temperature on the "y-axis" and time in minutes on the "x-axis". Check off each box as you add additional information to your graph so that none is missed.
Boiling Point = 56°C
Freezing Point = -95°C
Starting temperature = 65°C
1. After five minutes, gaseous acetone starts to turn liquid. It takes five minutes to liquify completely.
2. After 15 more minutes, it begines to freeze. It freezes completely for 10 minutes.
3. It is further cooled for 5 more minutes until acetone reaches -105°C
4. Label "Freezing" where this takes place.
5. Label "Condensation" where this takes place
6. Label "Phase Change" where a phase change occurs.
7. Indicate where acetone is only a SOLID, only a LIQUID, and only a GAS.
8. Of the three phases, label which phase has: Weakest IMF, Strongest IMF, and Medium IMF.
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