Producing a heating curve for water is fairly simple. You could place a large sample of ice in a beaker and heat it using a hotplate while recording the temperature every minute. However, in this activity the data has already been collected for you. In this assignment, you will graph and analyze an actual heating curve for water. Then, using the data from the heating curve, answer the analysis questions.

This activity with the heating curve data is available in a printable version.

Graph the Heating Curve of Water

Procedure

Use the data from the following table to produce a heating curve for water. Make sure your graph contains a title and labeled axes. Also, label the sections of the graph that represents water as solid, liquid, and gas.

Heating Curve of Water
Time (minutes)	Temperature (°C)	Time (minutes)	Temperature (°C)
0	-10	21	100
1	-5	22	100
2	0	23	100
3	0	24	100
4	0	25	100
5	0	26	100
6	0	27	100
7	0	28	100
8	0	29	100
9	0	30	100
10	0	31	100
11	8.3	32	100
12	18	33	100
13	28.5	34	100
14	37	35	100
15	48.7	36	100
16	57	37	110
17	68.8	38	120
18	80	39	130
19	89	40	140
20	100

Analysis Questions

Once you have completed your graph, answer the following questions:

1. What is the melting temperature of water?
   
2. What is the boiling temperature of water?
   
3. What happens to the temperature of the water during a phase change?
4. Is the ice absorbing heat or releasing heat in order to boil?
   
5. How much time does the boiling phase take?
   
6. How much time does the melting phase take?
7. How much time does it take to heat the liquid water to the boiling temperature?
   
8. As what time does the liquid phase first appear?
   
9. At what phase does the gas phase first appear?
   
10. Describe what changes you would expect in this heating curve if the ice was allowed to melt on its own.

Once you have completed your graph and responses, submit your assignment to the dropbox.