DAY 110

Essential Question: What does thermal energy do?

GOALS: SWBAT...

1. understand the arrangement, motion, and energy of molecules in each phase

2. describe how molecules in a solid, liquid, and gas compare to each other

3. state how temp relates to the KE of molecules

WARM-UP 110 (4 min)

1. Rank the spacing from largest to smallest between solid, liquid, and gas molecules of the same substance.

2. Rank the energy from largest to smallest between solid, liquid, and gas molecules of the same substance.

3. Open Lab 5 States of Matter on Schoology. Need access? Message me on Remind. 

CLASSWORK

109A: CONTINUED States of Matter Simulation Lab (45min)

    Lab 5 - States of Matter Simulation Lab. Finish page 1. Use "Insert -> drawing -> +new"  and then the shapes tools to make your drawings

    Complete ALL

    States of Matter Simulation: LINK2

Backup Link to Lab in case you can't get access on Schoology Lab Document: LINK1

Last week there were multiple days with a beaker of boiling water on the hot plate on my desk

1. As the hot plate added thermal energy, what was the highest temperature the liquid water would achieve?

2. Once the liquid began boiling, would the temperature continue changing, or would it stop?

3. Instead of being used to raise the temperature, for what was the energy being used? 

Essential Question: What is Heat?

GOALS: SWBAT...

1. define phase change

2. Define terms related to phase change

3. Explore concepts related to phase change

WARM-UP (4 min)

1. If you put a huge amount of ice (8 cups = 500mL) and 2 cups (125mL) of water in a big container, what is the lowest temperature the water will achieve? 

2. Why did you choose that temperature? 

3. When you boil liquid water, does all the water turn to gas the moment the liquid reaches 100*C (212*F)?

4. Why not? 

CLASSWORK

109A: Phase Change Vocabulary 

110A: Phase Change Concepts (25min)

Continuing from yesterday, watch the video on Evaporation and Condensation, then use it, and your ability to search for information on the internet to find the answers to the following questions. 

1. Define "Phase Change" as it relates to chemistry (easiest to search " phase definition chemistry")

2. The phase of matter depends upon its _________ and the __________that is exerted upon it.

3. Define Evaporation:

4. 3a. Evaporation is (heating/cooling) process

5. Video Link: https://www.youtube.com/watch?v=wDYOtu6npNU

6. 3b. Molecules at the surface of a liquid gain enough Kinetic Energy to leave the liquid and become a gas. Where does this energy come from?

7. 3c. How does a canteen stay cool?

8. 3d. How do humans keep cool? How about dogs and pigs?

9. Define condensation:

10. 4a. Condensation is a ______________ process.

11. 4b. Where does condensation occur?

12. 4c. Why are steam burns worse than burns from liquids?

13. Define boiling:

14. 5a. Boiling, like evaporation, is a ____________ process.

15. 5b. Evaporation takes place at the ____________ of the liquid while boiling takes place _______________________

16.        Great article for finding the answer for 5b: AWESOME LINK

17. 5c. At high altitudes water boils at ____________ temperatures than lower altitudes.

18. Define freezing:

19. 6a. Freezing is a ______________ process.

20. 6b. How can you lower the freezing temperature of water?

21. Define melting: 

22. 7a. Melting is a ______________ process.

23. Energy must be ______________ ___ a substance to change its phase from a solid to a liquid to a gas. Energy must be ___________ from a substance in order to change phase in the reverse direction.

24. What happens to the temperature of the water while ice is melting?

25. At what temperature does water melt? At what temperature does it freeze?

26. At what temperature does water boil? At what temperature does it condense?

27. List the phase changes (melting, boiling, evaporation, freezing, condensing) below in the correct column:

28.                       Cooling Process                                                                  Warming Process

29. (releases thermal energy into its surroundings)        (absorbs thermal energy from its surroundings)

**Not sure about heating and cooling processes? Check here: http://www.theweatherprediction.com/habyhints2/524/

110B: States of Matter Simulation Lab (15min)

    Make a copy of the Lab, title it "Lab 5 - States of Matter Simulation Lab - Your Name - Period X" and share it with me at josh.alexander@lausd.net

    Finish page 1. Use "Insert -> drawing -> +new"  and then the shapes tools to make your drawings

    Handout: LINK1

    Simulation: LINK2

Learning at Home/HW

1. Test revisions are now two days late. Question #1 was graded incorrectly, answer is D. 

2. Lab due electronically Wednesday - 11:59pm. Work on it at home or during nutrition/lunch

3. Complete 109A/110A and or 110B for HW (if necessary)