**Experiment to Determine the Boiling Point of Water and the Melting Point of Ice**

**A. Boiling Point of Water:**

**1.** **Introduction:**
The boiling point of a substance is the temperature at which it changes from its liquid phase to its gaseous phase. In the case of water, the boiling point is an important physical property and is commonly known to be 100 degrees Celsius at standard atmospheric pressure.

**2.** **Materials Required:**
- Water
- Heat source (e.g., Bunsen burner or hot plate)
- Thermometer
- Stopwatch or timer
- Beaker or container to hold the water

**3.** **Procedure:**
1. Fill the beaker or container with a sufficient amount of water.
2. Insert the thermometer into the water, ensuring that the bulb of the thermometer is fully submerged.
3. Place the beaker or container on the heat source (Bunsen burner or hot plate).
4. Gradually increase the heat and start the timer.
5. Observe the temperature of the water at regular intervals (e.g., every minute) until it reaches its boiling point.
6. Record the time and temperature values in a table.

**4.** **Observation:**
Table showing the time (in minutes) and temperature (in degree Celsius) of water during the experiment:

| Time (minutes) | Temperature (°C) |
|----------------|-----------------|
| 1 | |
| 2 | |
| 3 | |
| 4 | |
| 5 | |
| 6 | |
| 7 | |
| 8 | |
| 9 | |
| 10 | |

**B. Melting Point of Ice:**

**1.** **Introduction:**
The melting point of a substance is the temperature at which it changes from its solid phase to its liquid phase. In the case of ice, the melting point is commonly known to be 0 degrees Celsius at standard atmospheric pressure.

**2.** **Materials Required:**
- Ice cubes
- Thermometer
- Stopwatch or timer
- Container or plate to hold the ice

**3.** **Procedure:**
1. Place the ice cubes on the container or plate.
2. Insert the thermometer into one of the ice cubes, ensuring that the tip of the thermometer is in direct contact with the ice.
3. Start the timer and observe the temperature of the ice at regular intervals (e.g., every minute) until it melts completely.
4. Record the time and temperature values in a table.

**4.** **Observation:**
Table showing the time (in minutes) and state of ice (solid, partly solid, partly liquid, liquid) during the experiment:

| Time (minutes) | State of Ice | Temperature (°C) |
|----------------|-----------------|-----------------|
| 1 | | |
| 2 | | |
| 3 | | |
| 4 | | |
| 5 | | |
| 6 | | |
| 7 | | |
| 8 | | |
| 9 | | |
| 10 | | |

**