Chapter 2 Review Sheet
Write answers only on separate sheet of paper!
Short Answer Questions
1.Name the phase change that occurs when a solid changes into a gas, without becoming a liquid.
2.True or False – A liquid has definite shape and definite volume.
3.True or False – A gas has definite shape, but no definite volume.
4.A ____ is similar to a gas, but conducts electricity.
5. Boyle’s Law shows a relationship between the ____ and volume of a gas.
6.Charles’ Law shows a relationship between the ____ and volume of a gas.
7.Whenput a balloon in a warm oven, the temperature goes from 70o to 140o. Will the 200 ml balloon shrink or expand?What will the new volume of the balloon be?
8. When you go up in a plane, air pressure goes from 1 atm. to 0.5 atm. Will the 1ml volume of air in your ears shrink or expand? What will the new volume of the gas in your ears be?
9. During a phase change, ____ stays the same.
10. For most substances, the ______phase is the densest phase. One important exception is _____.
Graph QuestionsThe graph shows data when a substance was heated at a constant rate.
11. At point A, the substance exists in a _____ state.
12. With each passing minute,_____is added to the substance.
13. This causes the molecules to _____more rapidly which we detect by a temperaturerise in the substance.
14. At point B, the temperature of the substance is _____.
15. At this temperature, the substance begins to _____.
16. At point C, the substance is completely in a _____state.
17. During the time from point D to point E, the substance is_____.
18. By point E, the substance is completely in the _____phase.
Substance / Melting point / Boiling pointBolognium / -10 °C / -30 °C
Unobtainium / -30 °C / 40 °C
Foolsium / 40 °C / -10 °C
19. Beyond point E, the molecules are moving _____as indicated by the increasing temperature.
20. Use this chart to determine which of substance was likely used in this phase change graph?
Essay Questions
21.You inhale and exhale a lot of air and moisture. Using your knowledge of phases of matter, explain why you can "see your breath" when you are outside on a cold day.
22.During the winter, snow often sits on a roof of a house. Houses that are poorly insulated will often have icicles hanging from the ends of the roof. If the water starts out as a solid phase in snow on the roof, explain how these hanging icicles form.
23. Describe what happened when Mrs. Madden put the shaving cream in the bell jar and turned on the vacuum pump and explain why. Also, identify which gas law applies to this demonstration.
24. If shaving cream was 10ml at 1 atm (room) what was its volume when it reached 0.5 atm?
25. Describe what happened when Mrs. Madden put the marshmallow in the microwave and explain why. Also, identify which gas law applies to this demonstration.
26. If marshmallow was 20ml at 20oC (room) what was its volume when it reached 80oC?