Aim
To observe waster as it changes state from solid to liquid and then to a gas.
Equipment
-A 250 mL beaker.
-Thermometer.
-Thermometer.
-Bunsen burner.
-Heatproof mat.
-Tripod.
-Gauze mat.
-Stopwatch.
-Retort Stand.
-Clamp.
-Ice cube.
Method
-Collect enough ice so that your beaker is half full and place the thermometer into it while you set up the rest of the equipment.
-Set up the retort stand and clamp alongside the tripod and gauze mat.
-Place the beaker of ice on the gauze mat and gently clamp the thermometer so that it is held upright and the scale is easy to see. The bottom of your thermometer should be low enough to still be covered by water when the ice melts, but not touching the bottom of the beaker.
-Record the initial temperature of the ice in the data table.
-Light the Bunsen burner and start timing with the stopwatch.
-Measure and record the temperature every minute.
-Continue measuring and recording the temperature until the water has been boiling for 2-3 minutes.
Results
Time (min)
|
Temp (°C)
|
0
|
0°
|
1
|
6°
|
2
|
19°
|
3
|
29°
|
Discussion
Using the word particles and energy explain why the ice melts.
When the heat is added, the particles vibrate so much that they break away. When more of the heat is added the heat's energy it slowly melts the ice away.`
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