|
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 |
