Lab #6 – Heating Up and Cooling Down (class of '22)

Lab #6 – Heating Up and Cooling Down

                      Copy ↑ into your Lab/Science Notebooks

Do you remember how long it took for a cup of hot chocolate to cool before you could take a sip?  Why do hot drinks come in styrofoam or special paper cups?  Why do teachers drink hot drinks out of porcelain mugs?  Why not glass, metal, or plastic cups?   ←↑just read that↗           ↗

Problem       copy this as always

There is a beaker of ice water in front of you; what will happen to it over time?

There is a beaker of room temperature water in front of you; what will happen to it over time?

There is a beaker of boiling water in front of you; what will happen to it over time?

Hypothesis  copy this as always, make your own hypotheses; use the prompts below as guidance      ↙↘

I predict that if I leave a beaker of ice water out then this will happen.... because....

I predict that If I leave a beaker of room temperature water out then this will happen....   because.... I predict that If I leave a beaker of boiling water out then this will happen....   because....

      

  Materials   copy this as always

3 beakers (I used pint glasses)

3 thermometers (I used one thermometer)

Online Stopwatch 

Ice

Hot plate  (I used a hot water pot)
Measuring cup, 250 mL

Procedure  READ this as always. Edit, I've changed it a bit;I used pint glasses, not beakers, and the volumes I used were 250mL, not 100mL

1. Use the data table to record the temperature of water in three beakers every minute from 0 to 10 min.
2. Fill one beaker with 100 mL of water. Place the beaker on a hot plate and bring the water to a boil. Carefully remove the hot beaker from the hot plate.
3. Record the water temperature in your data table at minute 0, and then every minute for 10 min.
4. Repeat step 3 starting with water at room temperature and ice water.

  Results copy these 3 data tables as always, use a ruler!

Ice Water

Time (min.)	Temperature ('F)	Temperature ('C)
0	32’F	0’C
1
2
3
4
5
6
7
8
9
10

   

Room Temperature water

Time (min.)	Temperature ('F)	Temperature ('C)
0
1
2
3
4
5
6
7
8
9
10

  

Boiling Water

Time (min.)	Temperature ('F)	Temperature ('C)
0	212’F	100’C
1
2
3
4
5
6
7
8
9
10

Analysis   Make 4 line graphs: a, b, c, d

1.   Use your data tables to construct four line graphs.
a.   Ice Water: x-axis - Time (min),  y-axis - Temperature (oF)
b. Room Temperature Water: x-axis - Time (min),  y-axis - Temperature (oF)
c. Boiling Water: x-axis - Time (min),  y-axis - Temperature (oF)
d.    Construct a fourth line graph using the data from all three data tables; there should be three lines: ice water (colored blue), room temperature, and boiling water (colored red).

                      This is an example of line graph a. ↓↓↓↓

Please answer ALL of these Analysis questions in complete sentences.
2.    What happened to the temperature of the boiling water over time?  Explain your answer.

3.    What happened to the temperature of the ice water over time?  Explain your answer.

4.    What happened to the temperature of the room temperature water over time?  Explain your answer.

5.    Do you think there will be a temperature at which they would eventually meet?  If so, where do you think it will be?  If not, why not?

6. Think Deeper: Why is the title of this lab called "Heating Up and Cooling Down" ?
7. Go Beyond: Illustrate the three beakers, label them, draw "heat arrows" showing the flow of thermal energy from the higher temperature substance to the lower temperature substance.  
8. Using a temperature conversion tool, convert the fahrenheit to celsius in your data tables.  eg temperature converter


Edit: I am aware that you all did not complete this lab on your own.  Please watch the videos, and complete the Conclusion based on the videos, the graphs, and theAnalysis responses.

Conclusion

What was your problem?  Restate your hypothesis.  Was it right? wrong?  why or why not? Did you change your hypothesis in the middle of your investigation?  If so, why? How is this investigation connected to 'real life'?    What did you learn in this lab?  What did you like about this lab?  What were some challenges you had to deal with?  What could you do next with this problem?  What other tests could you perform?  Write down any other additional thoughts, observations, inferences, etc.

And yes, follow the prompts to complete your Conclusion↖↗