DAY 112

Essential Question: How does thermal energy flow?

GOALS: SWBAT...

1. Define specific heat, latent heat of fusion, & latent heat of vaporization

2. Understand and use the heat transfer equation

3. Use specific heat, latent heat of fusion, & latent heat of vaporization to solve problems 

WARM-UP 112 (5 min)

1. Define "latent heat"  the heat required to convert a solid into a liquid or vapor, or a liquid into a vapor, without change of temperature

2. Define "fusion" 

3. Define "vaporization" 

4. Define "latent heat of fusion" 

5. Define latent heat of vaporization"

CLASSWORK

Recall:

112A: Specific heat, the latent heat of fusion, and latent heat of vaporization Notes

Watch the following:

https://www.khanacademy.org/science/physics/thermodynamics/specific-heat-and-heat-transfer/v/specific-heat-and-latent-leat-of-fusion-and-vaporization-2

For your notes....

0:00: Solve Problem #1

3:28: For Problem #2, what do you think the equilibrium temperature will be between the 90*C copper and the 20*C liquid water?

3:29: Solve Problem #2

3:41: Why is delta Q zero?

7:20 what kind of heat will we need to use to convert liquid to steam (a phase change)

7:21: Solve Problem #3

8:52: Once we reach 100*C, what equation do we use to determine the heat added?

10:27: For Problem #4 we're converting ICE to steam. What will be the first phase change?

10:28: Solve problem #4

112B: Problem Solving

    - example problem

    - practice problems

    TOMORROW

Exit Questions

1. Is the function of latent heat to change the state of an object, change the temperature of an object, or both?

Learning at Home/HW

Complete any of the remaining Classwork problems

Essential Question: What is Heat?

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 112 (4 min)

There was a pot of boiling water on the hot plate on my desk. It's maximum temperature was 103*C

1. Was the hot plate adding thermal energy to the water after the liquid started boiling? 

2. Once the liquid begins boiling, if energy was still being added, why didn't the temperature continue changing? 

CLASSWORK

1. 110B continued: States of Matter Simulation Lab (15min)

    Finish the entire lab. Use "Insert -> drawing -> +new"  and then the shapes tools to make your drawings, or if you'd like to screenshot, use ctrl+shift+(the screen button above button 6)

    Lab Document: LINK1

    Simulation: LINK2

2. 112A: Warm-Up Check

    Checking Day's 101-112 (12 days in total)

LEARNING AT HOME (HW)

1. Phase Change Video to help you answer Warm Up question #2 from today Link: https://www.youtube.com/watch?v=ciVM-tTVn28

    A few questions will be posted later Friday to go along with the video, to help you prep for Monday

    1. What is sublimation?

    2. Which substance goes through the process of sublimation?

    3. What does "intermolecular" mean?

    4. In a solid, the molecules are moving ________ and have very little ______ ______, therefore the bonds between molecules in the solid are fairly ________.

    5. What happens to the strength of the intermolecular bonds as each molecules KE increases?

    6. In which state are there no intermolecular bonds?

    7. Listen to her description of the plateaus in the phase change diagrams - what is the energy doing during this portion of phase change?

    8. The instructor mentions distance between molecules affecting potential energy. How does the distance between molecules affect the PE?