Ice/Water/Steam Investigation Lab

Ice/Water/Steam Investigation Lab

Question: What happens to the temperature of the water molecules as it changes state from solid to liquid and then to gas.  How does salt effect the boiling temperature of the water?

Objective:  To observe the temperature and heat of H₂0 as it changes state.  You will create your own procedure and use any materials listed.  Then after you observe your water boil, add salt to the water and observe its temperature.

Materials you can use: Hot plate, thermometer, balance, cups, beaker, stirrer, graduated cylinder, stopwatch on your phone, salt

RULES:
1. DO NOT LEAVE THE THERMOMETER IN THE BEAKER. Do NOT let it sit at the bottom of the beaker, hold it in the middle.

2. The amount of salt you use it up to but write down the total.

3. Stir your ice/water mixture regularly.

4. Your hot plate must be on a low setting, not turned all the way up.

5. Do NOT place anything on the hot plate except the beaker.

In your composition book:

1. Provide a detailed list of your steps in your procedure. Make sure to detail how much ice, salt and water you have in your experiment.

2. Collect data in a data table and make sure it is legible and it is clear what you are collecting and units are used.

3. Create a line graph of your data showing change over time.

4. Write an explanation of what your data showed during your investigation as it relates to the ice, temperature and heat.  (Hint: Think about including words such as melting, boiling, heat, temperature, constant.)

5. According to your data and graph, what is the freezing temperature of water? The boiling temperature?

6. Look at the graph. Did you have a period of time where your temperature was constant? Explain when and what was happening in your experiment.

7. What effect did adding salt have to water when it was boiling? How is this related to your ice cream lab?

8. Create a model the ice before you added heated and then when it completely melted, then when it was boiling. (Three models in total)