Question

Some ice is taken in a beaker and its temperature is recorded after each one minute. The observations are listed below

Time (in minute)	Temperature (in °C)
0	0
1	0
2	0
3	0
4	0
5	0
6	3.8
7	7.6
8	11.4

From the above observations, what conclusion do you draw about the melting point of ice?

Answer 1

• The temperature remains constant at 0°C for a period of time (from 0 to 3 minutes) even though heat is being supplied.
• After 3 minutes, the temperature starts increasing.

This indicates that the melting point of ice is 0°C. During the melting process, the heat energy supplied is used to overcome the forces holding the ice molecules together in the solid state, rather than increasing the temperature. This phase change occurs at the melting point, which is 0°C for ice.