Why does a liquid stay at a constant temperature while it is boiling?

Answer 1

Because there is heat absorbed just transitioning from the liquid to the gaseous state, and that is done at the same temperature (i.e. water at 100 C, steam at 100 C). So the extra heat is immediately taken away in the vapor.
The same phenomenon occurs in the melting/freezing transition as well.

Answer 2

Energy added to a liquid increases the temperature of the liquid up until it reaches the boiling point. When the temperature reaches the boiling point, further energy put into the system is used change the liquid phase into the gas phase. The thermodynamic parameter used to quantitate the amount of energy needed to change a set amount of a liquid to its gas phase is called the heat of vaporization.

Answer 3

The boiling point is where the liquid becomes a gas. The gas is at a higher temperature than the boiling point and the liquid remaining in the container has not quite reached the point where it is converted into a gas - but it will and then it too will become a gas. In short, the remaining liquid in the container has not quite passed the threshold to become a gas but it is at the threshold.

Answer 4

When the liquid is boiling, it is changing its state. while changing its state all the energy which is provided by heating is used up in increasing the distances between the molecules..in moving apart..that is, in changing its state. since energy is used in this, no energy is used in increasing the kinetic energy of the molecules and thus no energy is used in increasing its temperature.

Answer 5

3. why is a burn from steam oftentimes plenty extra severe than one from boiling water? vapor is warmer then boiling water... whilst the liquid heats, the debris vibrate and whilst it reaches a definite temperature, the water debris vibrate plenty that they are further removed from one yet another and turns into vapour.