When water boils, additional heating will not raise the temperature. What does the additional energy do?
cause it to evaporate faster. beacuse water boils at 100Dcelcius
Correct. As heat is added at a higher rate, it boils away faster while remaining at 100 C
When water reaches its boiling point, the temperature remains constant even with additional heating. However, the additional energy provided is not wasted. It is utilized to convert the liquid water into water vapor or steam. This process is known as the phase change from a liquid to a gas.
To understand why the temperature doesn't increase during boiling, we need to look at the behavior of molecules in a liquid. In a liquid state, water molecules are constantly moving and interacting with each other. They have a certain amount of kinetic energy, which is responsible for the temperature of the water.
As heat is applied to the water, the molecules gain more kinetic energy, and their movement becomes more vigorous. Eventually, when the water reaches its boiling point, the molecules at the surface of the liquid have enough energy to overcome the cohesive forces holding them together and escape as vapor.
The thermal energy absorbed during this phase change is used to break the intermolecular bonds between water molecules and convert them into a gaseous state. This process requires energy, known as latent heat or heat of vaporization, which comes from the additional heating. As a result, the temperature of the boiling water remains constant until all the liquid water has converted into steam.
Once all the water has evaporated, further heating can raise the temperature of the steam. At this point, the steam is a different phase of matter and behaves differently from the liquid water.
In summary, when water boils, the additional energy provided by heating is used to convert the liquid water into water vapor or steam, rather than increasing the temperature.