Why doesn't the temperature of water change during melting?

Answer 1

The melting and freezing temperature of water are the same: 0o C; thus, both water and ice can exist at this temperature. Lets say a block of ice is starting at a temperature below the melting point. As the temperature of the ice rises, the heat energy being transfered into it goes to raising its temperature, but when the temperature reaches the melting point, the heat energy introduced does not go into raising the temperature but instead into breaking the bonds holding it as a solid. The ice-water mixture will remain at 0o until all of the ice has fully melted. Only after all of the ice has melted does the heat energy go into heating the water.

Answer 2

The melting and freezing temperature of water are the same: 0o C; thus, both water and ice can exist at this temperature. Lets say a block of ice is starting at a temperature below the melting point. As the temperature of the ice rises, the heat energy being transfered into it goes to raising its temperature, but when the temperature reaches the melting point, the heat energy introduced does not go into raising the temperature but instead into breaking the bonds holding it as a solid. The ice-water mixture will remain at 0o until all of the ice has fully melted. Only after all of the ice has melted does the heat energy go into heating the water.

Answer 3

The energy that goes into temperature change is being used to change the state of the water, and until the transition is complete, it will not change temperature. The same goes for turning liquid water into a vapor.

It is called the "latent heat", and sometimes "heat of fusion".

Answer 4

When ice warms up to the freezing point, all further energy added to the ice will go to the process of actually melting it, or changing the phase, in what is called the latent heat of melting. Once all the ice melts, the water will be the same temperature, but will then be able to heat up as more energy is added.

Answer 5

When a substance melts, there is a "Latent heat of fusion" involved, there is a certain amount of heat required for the change of state to occur (here, change of state from solid to liquid). So, whatever heat is supplied to ice, is utilized in conversion of ice to water, and thus no heat can be utilized in raising the temperature of water. Eventually, when all of the ice is converted into water, if you continue to supply heat, the temperature of water will start rising. This is the very reason for the term "LATENT heat of fusion", because, the heat that is being used up in melting the ice is "invisible" to us, because temperature doesn't rise.

Answer 6

It only does in the space of the ice melting.