Investigating State Changes

Aim: To observe water as it changes state from solid to liquid and then to a gas

Equipment: A 250 mL, thermometer, Bunsen Burner, Heatproof mat, tripod and gauze mat, stopwatch, Retort stand and clamp, Ice Cubes

Method
Set up the retort stand and clamp alongside the tripod and gauze mat.

1: 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.
2: Set up the retort stand and clamp alongside the tripod and gauze mat.
3: 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 use. 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.
4: Record the initial temperature of the ice in the data table below.
5: Light the bunsen burner and start timing with the stopwatch.
6: Measure and record the temperature every minute.
7: Continue measuring and recording the temperature until the water has been boiling for 2-3 minutes.
Minutes             Temperature

0	0
1	0
2	25
3	39
4	47
5	56
6	69
7	74
8	82
9	90