Change of State Experiment

Table of Results

Time/minutes	Temperature/ degrees C	Observations
0.0	-2.0	No water present - only ice
1.0	0.0
2.0	0.0	Water and ice seen in the beaker
3.0	0.0
4.0	1.5	All ice has melted now - only water remains
5.0	15.0
6.0	29.0	tiny bubbles (of oxygen - a considerable amount of oxygen is disolved in cooler water - that's how fish can breathe) seen escaping from the water
7.0	43.0
8.0	57.0
9.0	71.0	condensation observed on the top of the beaker
10.0	83.0
11.0	94.5
12.0	98.0	bubbles appear near the surface as boiling point approaches
13.0	99.0
14.0	100.0	bubbles now appear in the middle of the water and vigorous boiling occurs
15.0	100.0	boiling continues - clouds of condensation are seen in the air above the beaker
16.0	100.0	boiling continues - the beaker is so hot at the top now that condensation on it is no longer observed
17.0	100.0	boiling continues and it is obvious that the volume of water in the beaker has decreased

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