A substance is heated at a constant rate and its temperature is taken every minute. During the heating, the substance undergoes one change of state. The results are shown on

the graph in Figure 5. Explain the shape of the graph in terms of the changes in the movement and arrangement of the particlesas the substance is heated.

Fig: 1

Fig: 2

Fig: 3

Fig: 4

Fig: 5

Fig: 6