Investigating state changes

Aim

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

Equipment

A 250 ml beaker thermometer bunsen burner heat proof mat tripod and gauze mat stopwatch retort stand and clamp ice cubes

Method 

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  test of the equipment

set up the retort stand and clamp alongside the tripod and gauze

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 intail temperature of the ice in the data table below

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 to 3 minutes