Answer the following :

Describe an experiment to show the change in state on heating.

An experiment that can be used to show a change of state on heating is melting of wax.

Materials required: coloured wax candles, pan, gas stove or burner.

Steps involved:

(i) Take 2 to 3 coloured wax candles in a pan. (Coloured wax will be easy to identify after melting).

(ii) Provide heat to the pan containing candles with help of gas stove or burner.

(iii) Keep the pan undisturbed for some time.

(iv) After a few minutes wax will start to melt into a liquid.

(v) There is a change of physical change happening in form of change of state of the wax from solid to liquid.

Result: the wax candles will be melted completely on the application of heat and will undergo a change of state.