Understand the change in the phases of matter

Understand the change in the phases of matter. Click on the link to Watch the VIDEO explanation: Watch Video

The three phases of matter are solid, liquid and gas. Let us see water go change of phases under different conditions of temperature. Arrange apparatus as shown here. Take some ice in round bottom flask and heat it. Cubes of ice melts to form water which is the liquid state of ice. Continue supplying heat. Water gets converted into steam which is gaseous phase of water. Continue heating till all water converted into heat. Now remove source of heat energy. Steam is being cooled and condensed into water collected in a beaker. This process of conversion of heat into water is called condensation. Now deep freeze the condensed water. We get back the ice. This shows that a solid can be converted to its liquid state and then to its gaseous state by supplying heat and then on removal of heat the process is reversed. Most substances can be converted from one state into another. Wax, iron, gold, silver, copper are some substances that can exist in all three states.