EXPERIMENT 1: LATENT HEAT In this experiment you will investigate the temperature of water during its solid state and when it is boiling. PROCEDURE Freezing Water 1. Use the pipette to fill the test tube with approximately 1.5 mL of water. 2. Move the temperature marker on the thermometer down to the -10 C mark. 3. Place the thermometer inside the test tube. The marker should be located at the very top of the test tube to prevent the thermometer from wiggling around. If not, adjust it accordingly. 4. Place the thermometer and test tube into a 250 mL beaker so that the test tube can rest upright. 5. Put the beaker with the test tube and thermometer in a freezer and allow approximately one hour to completely freeze and reach at least -5 C. If the temperature is at least -5 C, move on to the next step. If not, wait for the temperature to drop before moving on to the next step. 6. Take the beaker and test tube with thermometer out of the freezer. 7. Record the temperature on the thermometer in Table 2 and make an observation about the state of the water. 8. Repeat Step 6 every five minutes for thirty minutes. Boiling Water 1. Fill a pot halfway with water and place it on the stove top. 2. Place and hold the thermometer in the center of the water. 3. Turn on the stove to bring the water to a boil. LAB SAFETY: Use caution when handling boiling water. Monitor the apparatus at all times and never handle a hot pan without a hot pad or oven mitt. 4. Once the water begins to boil, wait one minute and record the temperature on the thermometer in Table 3. 5. Wait five minutes and observe another reading of the thermometer. Record the temperature in Table 3.

Table 2: Temperature of Frozen Water Over Time

Time (s)	Temperature (C)	Observation
0
5
10
15
20
25
30

Table 3: Temperature of Boiling Water Over Time

Time (min.)	Boiling Temperature (C)
1
5