Compare the temperature of water before it is boiled while it is boiling and after it has boiled.Water slowly starts to boil because it has high specific heat due to its hydrogen bond. Which means temperature slowly increased before it will boils.
Before the water is boiled it is still cold. When the kettle gets hotter H2O break their bonds to their fellow molecules boiling-up bubbles, indicating that the water is getting hot. After it boils it reaches a temperature of 112° F or 100° C.
