When the pressure in the air is at the standard 1 atm, the boiling point of water will be 100 ° C and you won’t be able to get the water to a higher temperature no matter how you heat it.
If you observe the thermometer as the water boils, you will see that the temperature of the water rises until it begins to boil. When the water begins to boil, the temperature reaches and will remain at that point, even if you continue to boil it.
So why does no temperature change take place even though we keep heating the water?
When freshly boiled, the temperature of the water will constantly increase.
Heat is a type of energy that increases the temperature of an object and entails a change in the state of matter. The temperature of the water remains the same as the water begins to boil because the heat released from the boiling water is used to turn the water into steam.
It is not enough to boil water, but only heating it to 100 o C, but also a very large part of the stored heat must be transferred to it, in order to switch to another state of aggregation, that is, to turn into steam.
When we boil water in a pot or in a kettle, when the water boils, the temperature will reach 100 o C, at this time a part of the boiling water will turn into steam, the steam will extrude to break the water surface and evaporate into the air. gas, causing water to boil. Boiling water marks the transition from water (liquid) to steam (gas).
When freshly boiled, the temperature of the water will constantly increase. However, when the temperature reaches 100 ° C, the moment the water begins to boil, the temperature is kept the same because heat is used to change the state of the water, not to increase the temperature.
That is to say, the heat source that we use to heat the water in the jar has a temperature of 100 o C and it can only make the water in the jar reach 100 o C.
When the water reaches a temperature of 100 o C, the water will transform. (Photo: MysTown.com).
When at 100 o C, water is a mixture of both liquid and gaseous states, this is the moment of equilibrium between the liquid state and the gaseous state. Just heating water in the liquid state, when increasing the fire or continuing to maintain the heat, will make the water gradually change from the liquid state to the gaseous state. Water, whether in the state of a gas or liquid mixture, cannot rise to a higher boiling point.
It can be easily understood as follows:
This is why no matter how long we boil water, the temperature of the water does not rise.