When vapour condenses into liquid,

$A$ solid material is supplied with heat at a constant rate. The temperature of the material changes with heat input as shown in the figure. What does the slope of $DE$ represent?

What is the process of changing the state of matter called?

The graph shows the variation of temperature $(T)$ of one kilogram of a material with the heat $(H)$ supplied to it. At $O$,the substance is in the solid state. From the graph,we can conclude that

Explain the process of change in the state of matter by heating or cooling it.

$0.93 \, Wh$ of energy is supplied to a block of ice weighing $10 \, g$. It is found that: